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.

By ScienceInfo Editors Published December 18, 2018 1 min read 145 views

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 mass of salt, due to fluctuations in the earth's crust.

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Salt mines form a small city called Soledar , which means "gift from salt".

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It used to be considered a 16th century salt mining area, when salt was condensed by burning fire to evaporate steam.

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The process of exploiting salt by burning wood leads to deforestation.It is then exploited by coal but the production scale is still low.Under the electric light it shimmering like gems.

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By the 19th century, it was exploited on an industrial scale to ensure both productivity and resource protection.

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After more than 100 years of operation, the mine has become a 300m long tunnel, many places turn into a luxurious painting, music room . at the hands of artists-artists.

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There are even football fields, churches and bars for workers to create a closed complex.

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Cold and dry air contains a small amount of salt dust that is thought to be effective in treating diseases.