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Underground pool with calm reflections with stalactites hanging from the ceiling inside the Lehman Caves in Great Basin National Park
Insuyu cave from Burdur.
Lehman Caves, Great Basin National Park, Nevada - United States
Parachute Shield rock formation (speleothem) in Grand Palace area of Lehman Caves, Great Basin National Park, Nevada, USA.
Mammoth Cave National Park in Kentucky
Grotta di Nettuno - near Alghero (Sardinia, Italy)
Vjetrenica is the largest cave in Bosnia and Herzegovina, and the most biodiverse cave in the world.
Unique underground geology of  stalactites and stalagmites.
Underground pool with calm reflections with stalactites hanging from the ceiling inside the Lehman Caves in Great Basin National Park
Orbetello, Tuscany, Italy: The Risorgenza cave of Punta degli Stretti is located in the municipality of Monte Argentario, on the road from Orbetello to Porto Santo Stefano
Parachute shield cave formation
Layer upon layer of flowstone in Grand Palace area of Lehman Caves, Great Basin National Park, Nevada, USA.
Inside the well decorated Lehman Caves in Great Basin National Park, Nevada.
Waterfall shaped stalactites
Onondaga Cave State Park - 1998. Scanned from Ektachrome 200 slide.
Stalactite formations hanging from the ceiling inside Postojna cave, Slovenia.
Cave Jama Baredine in Croatia
Jagged stalactites densely cover the ceiling of a dark cave, illuminated by focused artificial lighting. The sharp mineral formations create a dramatic contrast between light and shadow, enhancing the mysterious, ancient atmosphere of the underground space. The textures suggest centuries of geological transformation.
Mammoth Cave National Park in Kentucky
Lehman Cave in Great Basin National Park, near Baker Nevada. In the Snake Mountain Range which contains limestone. The limestone has been removed by water and carbon dioxide to create the cave and the internal structures.  Columns result when a stalactite and a stalagmite join.
a large cave with a hole in it close up
The Marble Cave in Crimea, Ukraine
Photo taken in Gracac, Croatia
Underground pool surrounded by cave formations (speleothems). Lehman Caves, Great Basin National Park, Nevada, USA.
Rock formations inside of the Lehman Caves in Great Basin National Park, Nevada
Background photo of the cave inside the mountain. Natural formations are visible in the illuminated cave. Abstract shapes were formed with the effects of shadow and light. Shot with a full frame camera.
Caves of Han are a network of underground caves in Han-Sur-Lesse close to Rochefort, Wallonia, Belgium.
Lake Cave interior with stalactites and stalacmites, South Western Australia.
Gap Cave at the Cumberland Gap National Historical Park.
Insuyu Cave, Burdur, Turkey
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