Geological formation, Karst / caves

Alejandro de Humboldt National Park
Alejandro de Humboldt National Park covers a range of ecosystems unparalleled in the insular Caribbean.
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Carlsbad Caverns
The Carlsbad Caverns are an extensive cave system with over 80 known caves. It originated 250 million years ago as erosion started on a reef in an (evaporated) inland sea.
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Caves of the Aggtelek and Slovak Karst
The Caves of the Aggtelek and Slovak Karst is a transboundary karst cave system, noted for its high concentration of caves and their great variety in cave types.
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Desembarco del Granma National Park
Desembarco del Granma National Park has been recognized for its marine terraces and pristine sea cliffs.
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Gunung Mulu
Gunung Mulu National Park is renowned for its biodiversity and its karst features that hold some of the largest cave systems in the world.
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Ha Long Bay
Ha Long Bay is a group of offshore islands that is the best example of marine invaded tower karst in the world.
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Mammoth Cave
Mammoth Cave National Park holds the longest cave system in the world. Its known passages extend to 365 miles.
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Nahanni National Park
Nahanni National Park Reserve is an undisturbed river, canyon and cave landscape. It is the breeding habitat of four endangered species: peregrine falcons, golden eagles, bald eagles and trumpeter swans.
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Phong Nha - Ke Bang
Phong Nha - Ke Bang National Park contains a complex karst area dating from the Palaeozoic era, which makes it the oldest in Asia.
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Purnululu National Park
Purnululu National Park is famous for the sandstone domes, unusual and visually striking with their striping in alternating orange and grey bands.
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Skocjan Caves
The Škocjan Caves are located in the Kras region (literally meaning Karst) of southwest Slovenia and are considered a well preserved unique example of Karstic erosion.
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South China Karst
South China Karst can be considered as one of the two great karst regions of the world*. Within this 500.
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Tsingy de Bemaraha
Tsingy de Bemaraha Strict Nature Reserve covers a landscape of limestone karst pinnacles in the drier western side of Madagascar.
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