With its brilliant blue waters, refreshing air, and breathtaking clarity, the mystical Lake Mashu has fascinated many people who have come to see it.

The caldera of Lake Mashu was formed by a volcanic eruption that occurred around 7,000 years ago. Water accumulated in the caldera for thousands of years, creating the lake we see today. Lake Mashu’s primary source of water is rain, and with no rivers connected to it, the lake has very few impurities like plankton and clay particles. The exceptionally clear water gives the lake a unique deep blue shade that gives rise to its famous mystical views.

Lake Mashu is also famous as a foggy lake. From June to July, the lake usually gets covered in a thick fog. At times, the fog can clear up quickly, giving observers a sudden glimpse of the beauty and mysticism of the lake behind.

The most popular spots to see Lake Mashu are Viewpoint 1 and Viewpoint 3, but for the more adventurous, why not enjoy a view of the lake while trekking up Mt. Mashudake? You can also see alpine plants like wild azaleas and mountain harebells. The trail is 7.2 kilometers long, so be ready with the right equipment, and don’t forget to sign the climbing register.

The beauty of Lake Mashu is not limited to the daytime, as you can also enjoy spectacular views of the starry night sky from the lake at night. With the clear air around the lake, you can see the pitch black surface of Lake Mashu, and the twinkling stars rising from the tops of the serene mountains; a truly breathtaking experience.