Tapolca Lake Cave
The Lake Cave of Tapolca was discovered in 1903 during well-digging and was opened to the public ten years later. This way it became the first electricity-installed cave of Hungary, serving touristic aims as well. The cave was formed in Sarmatian limestone of the mid-Miocene Subepoch 13.7 million years ago. Therefore its rock is made up of limestone and marl layers left behind by sediments of the one-time Sarmatian Sea.
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