Mohsen (mohsen51)

Mammoth Cave National Park in Kentucky Stock Photo - Alamy

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A cave in Algarve, Portugal. Caves are the most beautiful natural areas and can be good models for design. Have you ever visited a cave?

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Meyil sinkhole lake in Konya. lake formed as a result of subsidence. Do you know anything about the land subsidence hazards?

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The courage of this geologist is commendable. He is taking pictures in volcanic lava above 1000 degrees.

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