In 1990, mining stopped at a 55-metre-deep Swedish limestone quarry; a year later, an opera singer discovered its remarkable natural sound, and it became Dalhalla, now drawing 100,000+ visitors each summer
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September 15, 2026
55-meters-deep Swedish limestone quarry When mining stopped at an isolated limestone quarry in central Sweden in 1990, the local area was left with a 55-metre-deep industrial pit cut into the pine forests outside Rättvik. Just a year later, a former…