Lake Tazawa is Japan’s deepest lake (the second being Lake Shikotsu and the third being Lake Towada), and was selected as one of the original 100 Landscapes of Japan. The area surrounding the lake is a designated prefectural nature park. The lake itself is roughly circular, with a perimeter of around 20km. On its shores, places of historical significance and ruins are enhanced by leisure spots. With so much to do, whether you’re going for a dive, a cycle or taking a trip on a sightseeing boat, there’s something for everyone to enjoy.