MASHU LAKE

The "Lake of Mystery" is located 12 km southeast of Kawayu-Onsen. This impressive volcanic lake is surrounded by walls nearly 300 m high. It is a unique feature in Japan. It can be seen and contemplated from two observatories. The Japanese particularly appreciate the seasons when the small island in the middle is hidden in the mists that cover the area. You can see it for a short time if you are lucky. It is also common to go there to enjoy the starry sky.