Having fun at an abandoned Soviet labor camp

"After the seizure of the Baltic states by the USSR, a maximum security prison had been established by the quarry at Rummu [Estonia]. The area was turned into a secure compound, where the incarcerated were used as forced labour. Post-USSR, the prison was closed and the pits flooded. Although the land is privately owned, over time it had become a favourite spot for residents and visitors to swim and relax in."