Rummu’s underwater prison is located in northwestern Estonia (about 40 kilometers west from Tallinn). Rummu is a small town in Estonia and had a nearby limestone quarry which was founded on 1 January 1938 together with Murru Soviet Prison (how convenient…) – Convicts were forced to mine limestone.
In 1991 when the Soviet Union collapsed, Estonia again gained it’s independence and limestone mining was ended, Soon enough the quarry became a “quarry lake” (faster than many assumed) thus resulting the flooding of buildings within the former soviet prison compound and even some machinery.
Nowadays the local people of Rummu fondly refer to the newly formed lake as “the blue lagoon.” This once eerie place which held about a thousand inmates is now an amazingly popular and mesmerizing beach where people swim in the deep blue water during the summer and dive almost yearlong.
For more information visit Wikipedia – Rummu
Google map of Rummu’s Underwater Prison