grey cliff near body of water

Once upon a time there were two dragons that used to live in Mt. Tymfi Dragon Lake and in Mt. Smolikas Dragon Lake. These two had an enmity between them and each time they got angry, they threw stones at each other. According to locals, this explains why the lakeshore of Mt. Smolikas Dragon Lake is white-coloured with scattered black stones, whereas the lakeshore of Mt. Tymfi Dragon Lake is black-coloured with scattered white stones! Dragon lake Greece altitude 2050m