Related by context. Frequent words. (Click for all words.) 57 Peruvian Amazon 53 rainforest 53 Amazon Rainforest 52 Amazon rainforest 52 Amazon basin 51 Madre de Dios 51 Chaco Canyon 50 Amazonian 49 highlands 48 Chihuahuan Desert 48 Mesoamerica 48 Peruvian jungle 47 Amazonia 47 Pantanal 47 Peruvian Andes 47 Amazon jungle 46 rainforests 46 Galapagos islands 46 Andes Mountains 46 Kumeyaay 46 Mayan 46 savanna 45 limestone caves 45 pre Columbian 45 Tarahumara 45 Kalahari Desert 45 Spanish conquistadors 45 ancient Mayan 45 Chaco 45 Andean highlands 44 prehistoric 44 indigenous tribes 44 Roraima 43 Chimayo 43 indigenous 43 Cerrado 43 Mesoamerican 43 Incan 43 uncontacted tribes 43 archeological 43 Patagonia 43 Andes 43 jungle 43 Tapajos 43 forests 43 nomadic tribe 43 prairie 43 Fertile Crescent 43 Manaus Brazil 43 lowland 43 tropical rainforest 43 middens 43 Iquitos 43 Palenque 43 Chachapoyas 42 Yaqui 42 forest 42 prairies 42 Yanomami 42 Burgess Shale 42 wildernesses 42 Anasazi 42 Thracian 42 outback 42 redwood forest 42 Big Thicket 42 ecologically sensitive areas 42 Lake Titicaca 42 prehistory 42 ancient 42 Patagonian 42 Chilcotin 41 cliff dwellings 41 tropical forest 41 Inca empire 41 highland 41 Beringia 41 virgin forests 41 Xingu 41 African savanna 41 tropical rainforests 41 jungles 41 ancient Mayans 40 Tikal 40 Pará 40 Scythian 40 Paiutes 40 caves 40 Mayan civilization 40 barrens 40 Mormon pioneers 40 archaeological 40 plains 40 San Ildefonso 40 Galápagos 40 Machu Picchu 40 ancestral lands 40 Australian outback 40 biosphere reserve 40 boreal forest 40 dense jungles