Cliff Palace, the largest cliff dwelling in North America, illuminated once a year during the Luminaria Festival in Mesa Verde National Park, Colorado.
Mammoth Cave National Park interior, Kentucky, USA. This national park is also UNESCO World Heritage Site since 1981.
Kaymakli Underground City, Nevsehir, Turkey
Kaymakli Underground City, Nevsehir, Turkey
Cliff Palace, the largest cliff dwelling in Mesa Verde National Park outside of Cortez, Colorado USA. This area was occupied by the Ancestral Puebloans (previously called the Anasazi).
Chavin, Ancash, Peru - Circa 2020: A stone wall corridor with artificial illumination in the Chavin de Huantar´s temple circa 2020 in Ancash Region, Peru
AJANTA, INDIA - FEBRUARY 6, 2017: Unfinished monastery (vihara), cave 24, carved into a cliff in Ajanta, Maharasthra state, India
A colorful valley with the East Fork of Dallas Creek and WIllis Swamp with dramatic Fall colors below Mount Sneffels and moody sunset clouds in the San Juans Mountains of Southwest Colorado.
Sunlit Autumn color reflected in Warner Lake in the Manti-La Sal National Forest below Haystack Mountain near Moab, Utah.
A colorful Southwest sky behind Delicate Arch in Arches National Park, Utah.
A juniper tree sits on a rock ledge over a Colorado River Gooseneck, seen from Dead Horse Point State Park, Utah.