Estonia
Water Activities in Rummu Quarry
Rummu is an interesting place ~45 min drive out of Tallinn.
The mining of Vasalemma limestone and marble in the Rummu quarry started as early as 1938 and the prisoners of Murru Prison were used as labour. The spoil gradually turned into an ash hill. At one point, the work ended, the drainage of water was stopped, and the quarry flooded. The industrial buildings, equipment, and trees were submerged.
You can do lots of great water activities there like underwater diving, SUP, kayaking or other kind of boat tours, trail walking.
You can also take part in a guided tour of Rummu Prison (formerly Murru) including a special Soviet Show Programme.