The Lázbérci Reservoir is one of the largest reservoirs in northern Hungary, created by the closure of the Bán Patak Valley in 1967-68, to secure the water needs of the Sajó Industrial Area and provide drinking water to the surrounding settlements. The artificial lake of 6.2 million m³ has since played an important role in the life of the area. The area belongs to the protected area Lázbérci, which was founded in 1975 and is the first protected area of northern Hungary.
Source: Wikipedia