Reserva de la Biósfera Calakmul, Campeche, Mexico
Reserva de la Biósfera Calakmul, Campeche, Mexico
Peñasco Blanco, Chaco Canyon National Historic Park, New Mexico
Peñasco Blanco, Chaco Canyon National Historic Park, New Mexico
Marble Canyon Idyll, Grand Canyon National Park, Arizona
Marble Canyon Idyll, Grand Canyon National Park, Arizona
Pictograph, Jones Hole, Utah
Pictograph, Jones Hole, Utah
Cobá Ballcourt Glyph, Quintana Roo, Mexico
Cobá Ballcourt Glyph, Quintana Roo, Mexico
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