Surrounded by forested mountains, this idyllic lake fills a volcanic crater 2km around and is over 100m deep. The clear, clean water takes on colors ranging from turquoise to slate. It’s a pleasure to walk around the lake and in the surrounding mountains, spotting birds (some 250 species) and butterflies along the way. You can also climb to an abandoned gold mine, cycle, swim, kayak or fish for black bass and perch. A number of small restaurants serve fresh lake fish.