Like a lot of Lillafüred, the lake at the resort is the result of human intervention, and was formed when the Szinva and Garadna streams were dammed in the early 19th century to provide an iron furnace with a steady water supply.
The lake is 1.5 kilometres long, bending between the high wooded valley sides.
On the eastern shore by the resort there’s a scenic promenade and you can hire a bike in the summer, or rent a rowboat or paddle boat for a brief voyage.