Related by context. Frequent words. (Click for all words.) 69 cliff dwellings 65 Chaco Canyon 61 Anasazi 58 adobes 58 pictographs 58 middens 57 Palaeolithic 56 Inca Empire 56 Canyon de Chelly 55 prehistoric 55 petroglyphs 55 Kumeyaay 55 archeological digs 55 pre Incan 55 limestone cave 55 Mimbres 55 lava tubes 55 petroglyph 55 Mesoamerican 55 archeological 54 Paiutes 54 archeological sites 54 limestone caves 53 pottery fragments 53 rock outcrops 53 archaeological sites 53 caves 53 Hohokam 53 archaeological 53 Olmecs 53 Chihuahuan Desert 52 Bighorn Basin 52 Incas 52 ancient 52 Archeological 52 stelae 52 Amazonian rainforest 52 archaeological artifacts 52 Ancient Roman 52 prehistory 52 Miwok 52 Tiwanaku 52 Upper Paleolithic 51 archeologists 51 Prehistoric 51 Chiricahua 51 ancient Mayan 51 burial mounds 51 Egyptian pyramids 51 Mexica 51 Egyptian pharaohs 51 Incan 51 Spanish conquistadors 51 Sassanid 51 Bandelier 51 Paleolithic 51 royal tombs 51 funerary objects 51 Harappa 51 Atapuerca 51 archaeological ruins 51 Native Americans 51 cenotes 51 pre Columbian 50 Harappan 50 adobe brick 50 Mesolithic 50 ancient Mesopotamia 50 fossil specimens 50 radiocarbon dated 50 Carlsbad Caverns 50 Omo River 50 Archaic 50 artifacts 50 flora fauna 50 Yuan Dynasty 50 Pre Columbian 50 sagebrush habitat 50 neolithic 50 excavated 50 Huichol 50 Mayan 50 archaeologists 49 Mesoamerica 49 dinosaur footprints 49 Knossos 49 ancient kingdoms 49 midden 49 archaeologically 49 fossils 49 Tenochtitlan 49 Hittites 49 Inca empire 49 ranchos 49 Sumerians 49 Inca ruins 49 Thracians 49 landform 49 archaeological finds 49 cave dwelling 49 buffalo herds