8 photos

Petroglyphs, Oro Valley, Arizona

Petroglyphs, Oro Valley, Arizona

Aztec Ruins National Monument, New Mexico

Aztec Ruins National Monument, New Mexico

Aztec Ruins National Monument, New Mexico

Aztec Ruins National Monument, New Mexico

Flaming House Ruin, near Monticello, Utah

Flaming House Ruin, near Monticello, Utah

Kiva, Mesa Verde National Park, Colorado

Kiva, Mesa Verde National Park, Colorado

Mesa Verde National Park, Colorado

Mesa Verde National Park, Colorado

Spiral Petroglyphs, Saguaro National Park, Arizona

Spiral Petroglyphs, Saguaro National Park, Arizona

Chaco Culture National Historical Park, New Mexico

Chaco Culture National Historical Park, New Mexico