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CLEARWATER Cave - Show cave tour at Gunung Mulu National Park
Symbolic/spiritual mounds created by Native Americans in Effigy Mounds National Monument - May 2010
An old water diversion tunnel along a river.
Scenic view of underground cave over lake
Huel Lee or Hohllay on the Mullerthal trail in Luxembourg, open cave with view to the forest, sandstone rock formation
Big Room in Carlsbad Cavern National Park
Seven sleepers mosque aka Yedi uyurlar camii and Cave of seven sleepers in Tarsus, Mersin, Turkey
Kaklik Cave in Denizli, Turkey
Cliff Palace in Mesa Verde National Park is the largest cliff dwelling in North America and stands in southwestern Colorado. Ancestral Puebloans inhabited the ancient city continuously from 1190 - 1260 AD.
Hoo-doos below
Autumn colors in the public park. Arkansas, USA
Gilfenklamm gorge. Racines. Autonomous Province of Bolzano. Trentino-Alto Adige. Italy.
Russell Cave National Monument
White mineral formations in the Kaklik Cave in Denizli, Turkey
Cennet and Cehennem, Mersin, Turkey-December 31, 2023: people are visiting the two large sinkholes called Cennet Cehennem in the Taurus Mountains, in Mersin which are among the tourist attractions.
A female hiker in the Pokljuka gorge,Bled,Gorenjska ,Julian alps, Slovenia
schwedenhöhle / gohrisch, sandstone cave saxon switzerland, germany
Bouquet of aragonite, Gouffre Géant de Cabrespine, Giant chasm of Cabrespine
The Bolii Cave at Petrosani in Romania
Zaire Province, Angola: rock columns in the Zau Evua Caves, meaning 'Nine Elephants' in the Kikongo language and considered a sacred place - located in a huge rock outcrop near the M'Banza Kongo - N'Zeto road.
Limestone landscape - Grohot-Metaliferi Mountains Natural Bridge - Romania.
The Natural Bridge Aerial View - Rockbridge County Virginia State Park Trail
New Athos Cave, Abkhazia, underground view
Spectacular underground limestone rock formations, lit up by lights, inside the Kooringa Cave, part of the Wombeyan Karst Conservation Reserce in the countryside near Goulburn, NSW
Dikteon cave. Place of Zeus birth. Crete. Greece. Horizontal
beautiful cueva de saturno in cuba.
Pestera Romanesti (Cave of Romanesti) is a famous concert location, situated in Poiana Rusc Mountains, also known as the Great Cave of Fereeti or the Water Cave. The first concert hosted by the Româneti Cave took place in 1984.
Stalactite formations hanging from the ceiling inside Postojna cave, Slovenia.
Cave church, panorama from man-made caves, Lesnovo, Macedonia. In the peaks of mountain near monastery complex there are a number of man-made caves, and commemorative plaques.
Autumn in Watkins Glen State Park, near Seneca Lake, New York State, USA. This is near the entrance.
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