My parents live in this village less than an hour from France called Banyoles. It's a strange place, geographically spaking, because everything is sort of volcanic... in a country were there's no geothermic activity at all.
This lake is sort of the center of everything since always but, aparently, now it's way smaller than it was years ago. There's an awesome draining system that goes all through the village though, with tons of old canals (with old sinks to wash clothes) and irrigation ditches that I've followed sometimes, even if it gets sort of complicated to pass through there.
It's also one of the favorite places for a lot of rowing teams to practice.