I went to Albania in 2009. I stayed at a hotel by the Lake Ohrid in Pogradec/Albania. The lake is located between on the border Macedonia and Albania. Probably Ohrid can be the cleanest lake in the world, because the water is like a juice of water and it can drink due to self-cleaning feature. Also, Ohrid lake was added as World Heritage List by UNESCO...
I hope it stays as I remember it. I took this photo for memory Ohrid Lake. 