Related by context. Frequent words. (Click for all words.) 61 Canyon de Chelly 61 petroglyphs 59 buttes 57 sandstone cliffs 57 Superstition Mountains 57 Anasazi 56 petroglyph 56 pictographs 56 butte 56 archeological sites 55 Mesa Verde 55 canyon 54 rock outcrops 54 mesas 53 caves 53 burial mounds 52 Ghost Ranch 52 Chihuahuan Desert 51 archaeological sites 51 mesa 51 archeological 51 lava tube 51 Hopis 50 Carlsbad Caverns 50 Hohokam 50 rustic cabins 50 rock formations 50 stupas 50 archaeological 50 arroyos 49 cairns 49 landform 49 ancient ruins 49 teepees 49 royal tombs 48 archaeological finds 48 canyon rim 48 aspen trees 48 pueblo 48 alpine lakes 48 Sonoran Desert 48 Lassen Volcanic National 48 dinosaur footprints 48 Mayan ruins 47 Mogollon Rim 47 Book Cliffs 47 tallgrass prairie 47 Sangre de Cristo Mountains 47 tepees 47 rice terraces 47 hot springs 47 pristine wilderness 47 Tikal 47 Palo Duro Canyon 47 Angkor Wat 47 prehistoric 47 monuments 47 hand hewn 47 Caverns 47 www.nps.gov 47 grottoes 47 karst 47 Mammoth Cave 46 petrified wood 46 wildernesses 46 Grand Canyon 46 Buttes 46 sheer cliffs 46 Egyptian pyramids 46 ancient civilization 46 pueblos 46 cave 46 saguaro 46 archaeological artifacts 46 log cabins 46 archaeological discoveries 46 Sonoran desert 46 bosque 46 Yosemite Valley 46 Kaibab 46 Chimney Rock 46 rock outcroppings 46 Chichen Itza 46 granite boulders 45 Judean Desert 45 stonework 45 ponderosa pines 45 breathtaking vistas 45 Mayan civilization 45 mountain biking trails 45 carvings 45 massif 45 stalactites 45 rancho 45 middens 45 cottonwood 45 dinosaur bones 45 tipi 45 redwood forest 45 sandstone 45 archeologists