Swimming on a lake
This lake was not here when I was a kid.
I do remember, though, time when I was something like 17 - my grandparents took me to this place, just few kilometers from their house. They said - this is an open pit and while excavating, they found a spring. And it kept on filling with water.
back then, the water line was probably 5-10 meters lower that it is now - now it looks like a normal lake. But I know it is not a normal lake. It's much more - and the cliffs are pretty safe to jump from.
And as I said, this lake wasn't there when I was a young kid.