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(Click for frequent words.) 81 caves 60 cavern 60 Alum Pot 58 limestone cave 58 Plato allegory 56 Cave 56 Caves 53 lava tube 53 lava tubes 53 mountain 53 caving 53 Cuetzalan 53 Priest Grotto 52 affects hibernating bats 52 Sloans Valley 51 Mayan temple 51 limestone caves 51 caverns 50 underground cavern 50 limestone caverns 50 mine shaft 50 Son Doong 50 spelunking expedition 50 limestone cavern 50 stalagmite formations 50 cavers 49 caver 49 Maquoketa Caves State 49 Genwal mine reported 49 canyon 49 stalactites stalagmites 49 underwater caves 49 crevasse 48 tomb 48 prehistoric cave 48 stalactite 48 Stag Leap Winery 48 limestone cliff 48 Devil Icebox 48 Alpazat caverns 48 Chauvet Cave 47 Bluejohn Canyon 47 spelunker 47 speleologists 47 prehistoric caves 47 unroped 47 Lascaux cave 47 mountainside 47 mineshaft 47 waterfall 47 Dan yr Ogof 47 Timpanogos Cave 47 gorge 47 Meramec Caverns 47 Mogao 47 cave dwelling 47 mountains 46 Buddhas carved 46 Bedouin shepherd searching 46 overhanging cliffs 46 Mount Bosavi 46 aspen grove 46 Actun 46 dank cave 46 emperor tomb 46 stalagmite 46 cliff dwellings 46 spelunkers 46 Mayan ruin 46 potholers 46 spelunk 46 ancestral Puebloan 46 meteor crater 46 receding glacier 46 Mammoth Cave 46 Pak Ou 46 stalagmites 46 Caverns 45 burrow 45 Sinking Cove 45 subterranean 45 bats hibernate 45 Carlsbad Caverns 45 icefall 45 karsts 45 steep canyon 45 trilobite fossils 45 spelunking 45 Dolly Sods 45 cave narrow passageways 45 subterranean cavern 45 Mount Timpanogos 45 ancient cliff dwellings 45 talus slopes 45 CADE Winery 45 cave explorers 44 prehistoric 44 Phong Nha 44 granite outcropping 44 Liang Bua 44 lair 44 stalactites hanging 44 Adi Ghar mountain 44 stalactites 44 Alpazat 44 dank caves 44 kiva 44 Frijoles Canyon 44 archaeologists 44 crevice 44 volcanic caldera 44 boasting prized 44 Spinkai 44 caving expedition 44 archaeological expedition 44 A. EverestNews.com 44 Kibbutz Tzuba 44 Jenolan 44 Archaeologists uncover 44 hibernaculum 44 mineshafts 44 karst limestone 44 volcano caldera 44 Roman villa 44 rockfall 44 Fantastic Caverns 44 ancient tombs 44 glacier 43 unclimbable 43 mummified cat 43 cavelike 43 mesa tops 43 Kanheri 43 Missing hiker 43 Laurel Caverns 43 King Tutankhamen tomb 43 Roman bathhouse 43 geoglyphs 43 prehistoric fossils 43 rocky crags 43 Climber dies 43 ancient petroglyphs 43 crevices 43 hideout 43 Caving 43 archaeological ruins 43 Nutty Putty Cave 43 grottos 43 cenote 43 lava spewing 43 dino prints 43 sandstone cliffs 43 Genyen 43 Your Knees Cave 43 Neanderthal bones 43 Genwal mine 43 Nazca lines 43 ledge 43 hut 43 tombs 43 kivas 43 cave dweller 43 rock formations 43 Uintas 43 necked plesiosaur 43 Archaeologists unearth 43 steep gully 43 karst 43 fossilized skull 43 speleothems 43 Petrified wood 43 excavations 43 Solomon Stables 43 Sussita 42 castle 42 fossils 42 Qoli Darvish 42 archaeologists unearthed 42 quarry 42 grottoes 42 Kamoamoa eruption 42 paleontological dig 42 Franz Josef glacier 42 experienced cavers 42 melting glacier 42 crag 42 Hallstatt 42 Siq 42 Denisova cave 42 coal mine 42 Basilosaurus 42 Huong Tich 42 underground lair 42 Areni 42 dungeon 42 Lascaux caves 42 Montalbini 42 rockface 42 crevasses 42 archeological ruins 42 Machpela 42 rappeled 42 wilderness 42 Chauvet cave 42 volcanic crater 42 underground 42 earthen walled 42 Devil Throat 42 Howe Caverns 42 Incas Machu Picchu 42 Nutty Putty cave 42 Urubamba Valley 42 Beardmore Glacier 42 Shivling 42 Altai Mountains 42 Chachapoya 42 archeologists 42 borehole drilled 42 climbers 42 Toltecs 42 Prehistoric 42 mine shafts 42 archaelogists 42 exquisitely preserved 42 Quelccaya ice cap 42 Beartooths 42 Herod tomb 42 UNSOLICITED OBSERVATIONS 42 Creswell Crags 42 ice stalagmite 42 creekbed 42 rock ledges 42 Cheddar Gorge 42 Porto Cristo 42 Tartarus 42 mastodon tusk 42 Barentsburg 42 steep sandstone cliffs 42 volcano 42 Boesmansgat 42 Weminuche Wilderness 42 monastery 41 Hiker dies 41 mountaintop 41 Sawtooth Mountains 41 subterranean caves 41 Huda Jama 41 burrows 41 Western Cwm 41 Bighorn Mountains 41 snowy wilderness 41 Tel Zayit 41 Tut tomb 41 Tam Coc 41 Tutankhamen tomb 41 underground caverns 41 Tanzania Mount Kilimanjaro 41 boulder 41 dinos 41 snailfish 41 Moche culture 41 granite domes 41 Gasherbrum 41 snowfield 41 postholes 41 unclimbed peaks 41 Anasazi ruins 41 lush meadow 41 forest primeval 41 saber toothed tiger 41 miners entombed 41 Plato Allegory 41 reclining Buddha 41 Lupanare 41 Bolaghi Gorge 41 stone cairns 41 Viengxay 41 extinct volcano 41 relicts 41 Joel Despain 41 Picos de Europa 41 Incan citadel 41 Wallowa Mountains 41 tomb KV# 41 Holy Cross Wilderness 41 Archeologists unearth 41 Bwlch Glas 41 Mount LeConte 41 near Hanksville 41 Tengboche 41 caves waterfalls 41 coalmine 41 stone washtub 41 toed statue 41 Ancestral Puebloan 41 wooden stockade 41 mountain redoubt 41 eared bats 41 Tsodilo Hills 41 Judean Desert 41 volcanic ridge 41 bat hibernacula 41 sarcophaguses 41 hogback 41 undersea volcanic 41 upper molar 41 Dig unearths 41 hot springs 41 rocky crevices 41 winged mammals 41 Siula Grande 41 crater 41 Speleological Society 41 refugium 41 sheer cliffs 41 grapevine moths 41 Marble Arch Caves 41 unexcavated 41 Climber rescued 41 Ancestral Pueblo 41 Costa Rican rainforest 41 yurt 41 Mammoth Site 41 cellar 41 fumarole 41 Kiyoshi Ikenouchi 41 Bayon temple 41 igloo 41 dense woodlands 41 termite nests 40 Yule Marble 40 dense foliage 40 stratovolcano 40 bubbling geysers 40 Riverbluff Cave 40 Nisqually Glacier 40 Kartchner Caverns 40 bivvy 40 volcano crater 40 henges 40 hermitage 40 grotto 40 Hohle Fels 40 meteorite crater 40 sarcophagus 40 Cappadocia 40 monastry 40 Lascaux 40 colossal statues 40 volcanic craters 40 Zhoukoudian 40 cliff 40 ark 40 archeologists unearthed 40 Hole DDHC 40 Loch Morar 40 Coire na 40 Buddhist relics 40 Ms Milowka 40 underground tunnels 40 sarcophagi 40 rock hewn 40 mountain climbers 40 excavate 40 Nanga Parbat 40 overhanging cliff 40 excavation 40 wooded mountainside 40 Matanuska Glacier 40 archeological 40 ancestral Puebloans 40 spiral stairway 40 excavated 40 Nazca civilization 40 Garhwal Himalayas 40 ravine 40 mummies unearthed 40 Yurungkax River 40 Incans 40 Wombeyan Caves 40 Zion Narrows 40 Shennongjia 40 Khumbu Icefall 40 Kata Tjuta 40 Emmett Trapp 40 couloir 40 untracked powder 40 Hiker survives 40 cenotes 40 fumaroles 40 campsite 40 deepest freshwater 40 Comb Ridge 40 herbivorous dinosaur 40 ichthyosaur 40 King Herod tomb 40 papyrus manuscript 40 Chomolungma 40 mountaintop fortress 40 Mount Rinjani 40 belayed 40 Tawa hallae 40 fossilized dinosaur bones 40 Cleopatra tomb 40 Navajo Sandstone 40 workmen huts 40 mine 40 glacial boulder 40 Jaekelopterus 40 dolmens 40 Byzantine mosaic 40 Canyonlands National 40 Gran Dolina 40 mountian 40 pottery sherds 40 Engineer Husnu Unal 40 Christian Kuntner 40 boulder dislodged 40 sabertooth tiger 40 cove 40 Ikenouchi 40 magma chamber 40 Doomsday cult 40 forested canyon 40 dinosaur precursors 40 Grand Canyon Parashant 40 Salar de Uyuni 40 backcountry 40 Bat Cave 40 Lop Nur 40 entombed 40 mountaineers 40 Archaeologists unearthed 40 massif 40 ancient emperors 40 Iguanodon 40 scorpion infested 40 Superstition Mountains 40 ancient Mayan ruins 40 dinosaur fossil 40 thunderous shudder 40 Rupal Face 40 Nubian kingdom 40 catacombs 40 Baltoro Glacier 40 sea serpents 40 Crandall Canyon 40 primitive campsite 40 calcite formation 40 Himalayas 40 experienced caver 40 Wilco van Rooijen 40 fossilized bones 40 Rongbuk Monastery 40 wooden stairway 40 cave dwellings 40 forested hillside 39 Uinta Mountains 39 Woolly mammoth 39 Gila Wilderness 39 lava 39 Lamoille Canyon 39 dragon lair 39 Utah Crandall Canyon 39 Geologically speaking 39 hiding 39 prehistoric paintings 39 cinder cones 39 hydrothermal vents 39 petroglyph 39 Ice Age mammals 39 sea hydrothermal vents 39 Selkirk Mountains 39 Dracula castle 39 Medano Creek 39 tufa towers 39 scree slope 39 Sahara desert safari 39 volcano Mount Vesuvius 39 moat drawbridge 39 craggy mountain 39 labyrinth 39 Bumpass Hell 39 tumulus 39 Cerro Baul 39 Masada overlooking 39 lizard 39 cu Oase 39 hairy creature 39 basalt cliffs 39 Franz Josef Glacier 39 Paleolithic cave 39 Linville Gorge 39 Allianoi 39 Khumbu glacier 39 Khao Sok national 39 Crandall Canyon Mine 39 Cu Chi tunnels 39 Russian doomsday cult 39 Ancestral Puebloans 39 expedition 39 Crandall Canyon mine 39 Fryingpan Valley 39 Genwal Mine 39 mummified body 39 Pavonis Mons 39 Kala Patar 39 Tiger Leaping Gorge 39 mountainous 39 Buddha statues carved 39 Daemonosaurus 39 unclimbed 39 Ciudad Perdida 39 Upper Gauley River 39 Machpelah 39 king Tutankhamen 39 Ice Caves 39 Çatalhöyük 39 Takur Ghar 39 Devil Den 39 Pumori 39 Mount Ararat 39 funerary urn 39 basement 39 Shivlingam 39 Gamburtsev 39 Nolichucky River 39 volcanic lava 39 Everest Lhotse 39 Hideaki Nara 39 dinosaur bones 39 Kunlun Mountains 39 beaver lodge 39 Absaroka Range 39 Sanxingdui 39 Rano Raraku 39 Pleistocene Age 39 Rongbuk 39 Bhimbetka 39 tunnel 39 Pharaoh Tutankhamen 39 petroglyphs 39 Arenal volcano 39 Peruvian Andes 39 Atlantis Massif 39 Icefall 39 partial skeleton 39 long necked sauropod 39 Sawtooths 39 Pemigewasset Wilderness 39 prophet Jonah 39 King Tutankhamun tomb 39 Vasari fresco 39 Stockholm Moderna Museet 39 waterfalls 39 Incan ruins 39 southern supercontinent 39 Juan Carlos Payan 39 Mount Emei 39 fossils unearthed 39 forested terrain 39 caldera 39 Lake Vostok 39 preserved mummies 39 undersea volcanoes 39 Eldorado Canyon 39 steep ravine 39 knapped 39 cave dwellers 39 Loben 39 cedar closet 39 raging rapids 39 hilltop fortress 39 Norris Geyser Basin 39 beaver pond 39 pygmy possum 39 Taroko Gorge 39 Visocica 39 marble quarry 39 Devil Staircase 39 rocky hillsides 39 archaeological 39 Aztec ruler 39 primeval forest 39 gypsum crystals 39 beehive shaped 39 tufa 39 Icadyptes 39 mummified 39 dino bones 39 igneous rock 39 dinosaur 39 prehistoric monsters 39 mud fortresses 39 Tora Bora caves 39 fossilized creatures 39 Egyptian tombs 39 Inferi 39 pictographs 39 Apennine mountains 39 Huayna Picchu 39 crawlspace 39 Canyon de Chelly 39 seracs 39 Jenolan Caves 39 Mount Mazama 39 frozen wasteland 39 planet Tatooine 39 switchback trail 39 Urubamba River 39 Columbian mammoths 39 Bitterroot Mountains 39 Poisonous snakes 39 Spruce Knob 39 timberline 39 nocturnal predators 39 Tioga Pass 39 Pachacamac 39 prehistorical 39 henge 39 Meager Creek 39 Serrania del Pinche 39 mountaineering 39 trapped 39 ancient pictographs 38 Tianchi 38 Utah Wasatch Mountains 38 lain undisturbed 38 Pangboche 38 priceless relics 38 Aztec ruins 38 Forgotten Dreams 38 Bam Citadel 38 backcountry campsite 38 pictograph 38 Great Aletsch Glacier 38 Uluru Ayers Rock 38 Mount Snowdon 38 Khumbu Glacier 38 steppe bison 38 Crni Vrh 38 Latok 38 slickrock 38 pygmy tarsiers 38 couloirs 38 Hindu Kush Mountains 38 catacomb 38 Arsia Mons 38 Xibalba 38 Kuelap 38 Misty Mountains 38 Waitomo Caves 38 Crib Goch 38 Baboquivari Peak 38 glowworms 38 sedimentary layers 38 tunnels 38 Archeologists excavating 38 Ruined Castle 38 Otzi 38 Gocta 38 metamorphic rock 38 sluffing 38 rangers rappelled 38 alpine valleys 38 Mansarovar lake 38 trapped miners 38 Talkeetna Mountains 38 posthole 38 Elah Fortress 38 exposed wooden beams 38 icy ledge 38 Deborah Sleeper 38 miners 38 Meadowcroft Rockshelter 38 burial cairns 38 Hermit Rest 38 terracotta army 38 Ancient Mayans 38 Shukron 38 subterranean caverns 38 Illumination Saddle 38 ANI Archaeologists 38 Qumran caves 38 El Zotz 38 batcave 38 hibernating bear 38 craggy mountainside 38 crater rim 38 Konar Sandal 38 prehistoric cave paintings 38 tadpole shrimp 38 metres/# 38 Shishapangma 38 limestone quarry 38 Liang Bua cave 38 Vinh Moc 38 redrock canyons 38 Sachkhere Georgian sentry 38 Krzowski 38 dolmen 38 mastodon tooth 38 Wishon Reservoir 38 Giza plateau 38 rocky ledges 38 Serpent Mound 38 saber tooth 38 previously unmapped 38 MacNayr 38 Krusac 38 Harney Peak 38 springhouse 38 basalt volcanic 38 Neanderthal teeth 38 Mendel Glacier 38 Naung Laing 38 llama trekking 38 Climber survives 38 woods 38 Gesher Benot 38 Thracian tomb 38 Japanese macaque 38 sandstone cliff 38 cliffsides 38 Estrada Belli 38 rocky ridge 38 leader Pyotr Kuznetsov 38 volcano Olympus Mons 38 Shiv Lingam 38 stoppings 38 Nemrut 38 archeologically rich 38 historic Manzana schoolhouse 38 Yosemite El Capitan 38 above timberline 38 Glyder Fawr 38 icefield 38 unspoiled wilderness 38 Chaco Canyon 38 Pottery shards 38 majestic waterfalls 38 Forir 38 fieldstone foundation 38 cliff ledge 38 sandstone bluffs 38 Tsangpo 38 corrie 38 flint arrowheads 38 Gorham Cave 38 bushwalkers 38 sea scorpions 38 Chimney Tops 38 wooded ravines 38 Sandia Mountains 38 pallasite meteorite 38 pharoah 38 Noah Ark. 38 Palaeolithic 38 fossilized shells 38 sepulcher 38 Abominable Snowman 38 fossilized feces 38 S. tchadensis 38 crawlspaces 38 waterfall cascades 38 desert playa 38 Huaca Pucllana 38 koppie 38 meteor fragment 38 Yellow Breeches Creek 38 granite spiers 38 craggy mountains 38 den 38 archaeologists excavate 38 amateur cavers 38 Boar Tusk 38 Carlsbad Cavern 38 Olduvai Gorge 38 Guge Kingdom 38 caved 38 Muir snowfield 38 Bronze Age burial 38 shell middens 38 limestone outcrops 38 titanosaurs 38 solidified lava flows 38 ascetics 38 Buddhist stupa 38 weta 38 impermeable shale 38 Karijini 38 Adventure Peaks 38 dinosaur footprints 38 Fossilised 38 belfry 38 icefields 38 hobbit sized 38 Borah Peak 38 ancient hominid 38 pueblo ruins 38 ice lingam 38 Oldonyo Lengai 38 Sacsayhuaman 38 Rongbuk glacier 38 attic 38 Kaiparowits Plateau 38 Atacama desert 38 avalance 38 prehistoric creature 38 prehistoric beasts 38 taiga forest 38 underground bunker 38 precipices 38 limestone sarcophagus 38 Ötzi 38 sandstone slab 38 archaeologist Shimon 38 human inhabitation 38 ventilation shafts 38 cicada nymphs 38 Gawis 38 barren expanse 38 meteorite craters 38 abyssal plain 38 archaelogical 38 Terra Sirenum 38 trapped underground 38 Wieliczka 38 Mount Minsi 38 climber Conrad Anker 38 Pastoruri 38 dinosaur fossils 38 mudflat 38 Machu Picchu 38 near Atarau 38 Foja 38 saber tooth tiger 38 Mike Morwood 37 cliffs 37 National Speleological Society 37 Nutty Putty 37 hiker 37 canebrake 37 igloo shaped 37 sandstone 37 glowworm 37 Werner Herzog Cave 37 Yixian Formation 37 mummified corpse 37 China Dabie Mountains 37 vertical shafts 37 karst topography 37 Smuggler Mine 37 Templo Mayor pyramid 37 Jerzy Kukuczka 37 montane forests 37 Poisonous gases 37 Inaki Ochoa 37 Rosmulder 37 Robert Kazmarcik 37 craggy cliffs 37 Mars Squyres 37 Tel Rehov 37 Huntington Gorge 37 granite outcroppings 37 bamboo grove 37 Rhodopes 37 nocturnal creatures 37 datable 37 petroglyphs depicting 37 CAIRO Archaeologists 37 rattle snakes 37 sanctorum 37 Fossil hunters 37 deep ravines 37 rockhound 37 uncharted wilderness 37 Buenavista Tomatlan 37 Paleolithic 37 ancient Thracian 37 corrugated metal sparking 37 creature 37 mammal fossils 37 sulfur springs 37 Wawona Tunnel 37 otherworld 37 dwarf hippos 37 Siloam Pool 37 Hyalite Canyon 37 Gaumukh 37 Kebler Pass 37 Gohar Tepe 37 Grottos 37 sauropod dinosaur 37 mud forts 37 Treasure hunters 37 tidepool 37 stone sarcophagus 37 rapelled 37 hillfort 37 subterranean depths 37 Carpathian mountains 37 Fa Hsien 37 stony hills 37 prehistoric cave drawings 37 Skhul 37 Beaconsfield goldmine 37 Gihon Spring 37 passageway 37 yetis 37 serac 37 Qinghai Tibetan plateau 37 Sacsayhuaman fortress 37 MEXICO CITY Archaeologists 37 Dolly Sods Wilderness 37 Oetzi 37 hibernacula 37 passageways 37 Ophel 37 ancient Anasazi 37 cistern 37 rocky incline 37 verdant valley 37 allosaurus 37 Rhodope Mountains 37 Buddhist monastery 37 Nanda Devi 37 calderas 37 Linville Falls 37 mastodon bones 37 survivor Brant Webb 37 bristlecones 37 alpine lakes 37 Cardamom Mountains 37 Cheops 37 Beijing Fangshan district 37 red sandstone cliffs 37 El Tajo 37 Socompa 37 Laban Rata 37 crocodile fossils 37 Herod palace 37 Guatemala sinkhole 37 ancient necropolis 37 glacial moraines 37 Khan Tengri 37 ancient lava flows 37 canyoneering 37 Khammouane province 37 geological formations 37 Journey Into Amazing 37 Washita River 37 Cenote 37 glissading 37 rugged wilderness 37 duckbilled dinosaur 37 Jurassic era 37 embers ignited 37 Amazonian jungle 37 Ghost Ranch 37 Zagan 37 plutonic 37 Bernese Alps 37 observatory 37 Lake Cahuilla 37 rodent burrows 37 Mount Lykaion 37 Pulag 37 meter Mount Baruntse 37 Askole 37 Strawberry Reservoir 37 Mount Bierstadt 37 limestone ledges 37 subterranean passages 37 creek 37 freshly dug trench 37 Rinca island 37 doomsday sect 37 cuneiform inscription 37 sandstone boulder 37 Yaprakci 37 glacial fjord 37 Siple Dome 37 Simon Kehrer 37 hermit 37 Petroglyphs 37 steep escarpment 37 Mont Blanc massif 37 fort 37 Ragged Range 37 Judean desert 37 Baywong 37 Polebridge 37 zircon crystals 37 Malapa 37 summited Shisha Pangma 37 backboned animals 37 sauropod skulls 37 Rotherwas Ribbon