Related by context. Frequent words. (Click for all words.) 46 salt crystals 46 middens 46 Mesoamerican 45 Mayan 45 Tenochtitlan 45 Olmec 44 midden 44 alabaster 44 Chaco Canyon 44 Palenque 43 ancient Mayan 43 Ancient Egyptians 43 hieroglyphs 43 red ocher 42 Inca 42 ancient Mayans 42 Incan 42 prehistoric 42 volcanic rock 42 oyster shell 42 serpent 42 lava rocks 41 pictographs 41 basalt 41 pomegranate seeds 41 Incas 41 driftwood 41 bulrushes 41 ocher 41 petroglyph 41 stalactites 41 mesa 41 excavated 40 pebbly 40 ancient 40 Chihuahuan Desert 40 lakebed 40 terracotta 40 pottery shards 40 Meso 40 marble slabs 40 gummy worms 40 ancients 40 Lake Titicaca 39 clam shells 39 ostrich egg 39 cliff dwellings 39 elaborately carved 39 mounds 39 conquistadors 39 petroglyphs 39 sepulcher 39 chert 39 adobe walls 39 carvings 39 scarab 39 stone slab 39 stone 39 rocks 38 whorls 38 calcite 38 cairns 38 petrified wood 38 pebbles 38 limestone 38 pumice 38 polychrome 38 granite boulders 38 mosaic tiles 38 sandstone 38 Nazca 38 Tikal 38 agates 38 serpents 38 pebbled 38 ancient Egyptians 38 stalagmites 38 travertine 38 prehistory 38 pre Columbian 38 lunar soil 38 Yucatán 38 crucified Christ 37 moss covered 37 Mesoamerica 37 Moche 37 earthenware 37 burial mounds 37 baptismal font 37 Pre Columbian 37 stele 37 terra cotta 37 mosaics 37 pyramids 37 Painted Desert 37 tapa 37 hieroglyphic 37 marl 37 Amazonian 37 moai 37 rock outcrop