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In the first chamber of the Saalfeld Fairy Grotto, the historical background of the mine is presented, including information about environmental radiation treatments formerly offered there until such treatments were found to be hazardous.
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Saalfeld Fairy Grottoes - Wikipedia
consist of three chambers connected by galleries. In the first chamber, information is presented about the history of the mine — in the 16th to 19th centuries an alum shale mine that was closed in 1850 but opened for sightseeing in 1914. [3] <span>In the first chamber, the historical background of the mine is presented, including information about environmental radiation treatments formerly offered there until such treatments were found to be hazardous. In the second chamber is found the source of the mineral-laden water that formed colorful stalagmites, stalactites and other shapes over the centuries. The third chamber contains the


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