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The undersea city was built from a 250 million year salt mine
This salt mine was formed 250 million years ago, under the seabed, as a rock salt material. When the sea is shallow it leaves a large cave with a huge amount of salt.
Salt Mine
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Articles about Salt Mine
3 published items.
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Rare photos of strange rock salt mines located deep in the bottom of the lake
Located 600m above the ground, under Lake Erie in Ohio, USA, the Morton salt mine is considered a wonder of beauty as well as a strange way of exploitation.
Scientific works
Amusement park in the planet's oldest salt mine
Salina Turda is one of the oldest salt mines in the world that has been renovated and built into an amusement park with many fascinating games.