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there is a partially underwater prison near the capital of Estonia that is a popular diving spot. The lake under which it is submerged was the quarry where the prisoners worked when the prison was operational. When it was abandoned the groundwater submerged it.
•1 min read
Fun Fact: there is a partially underwater prison near the capital of Estonia that is a popular diving spot. The lake under which it is submerged was the quarry where the prisoners worked when the prison was operational. When it was abandoned the groundwater submerged it.
Source
atlasobscura.com
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