Christened the "Lake of Five Colours", Lake Onneto is part of a landscape of great beauty, lined with fir trees and dominated by the smoking mass of Mt Meakan. A waymarked path runs along its eastern shore. It takes 50min to get to the 50m-high Yunotaki waterfall, whose waters reach temperatures of up to 43°C. You can take a dip in the open-air bath.