Dabníka dam ★ язовир Дъбника
Apparently a very good spot for angling. The dam is just a few kilometers northeast of Vratza.
When we were kids, we were told that the near chemical plant (in the right background) pours its toxic waste into the dam (which isn't quite false, they probably used its water for cooling, though) That led to mutation of fish which started snapping for swimming children (!)... A nice urban legend but the muddy water and the dangerous underwater pits would stop anyone from entering the water anyway.