Lacul fără fund Ocna Sibiului

Lacul fără fund Ocna Sibiului is a nature reserve in Romania featuring a deep blue lake where the ground collapsed in a crater-like formation. The lake is surrounded by salt deposits that shape both the water and the surrounding landscape.

The lake formed when an ancient salt mine ceiling collapsed, leaving a water-filled depression. The site became a protected area in 1962 to preserve this unique ecosystem.

The name translates to "lake without bottom", reflecting its mysterious depth and unusual character. Visitors notice the distinctive salty environment that only specialized organisms can inhabit.

The lake is accessible year-round with observation points available from different vantage points. The pathways around the area can be slippery or uneven, so appropriate footwear is advisable.

The water is so salty that it hosts dense communities of salt-loving organisms rarely found elsewhere. These specialized life forms have adapted to extreme conditions, creating a rare ecosystem.