Lake Motosu is a cool lake near Mount Fuji in Japan. It's the deepest of the Fuji Five Lakes, reaching depths of 121.6 meters (399 feet). Fun fact: it never freezes in winter! People love hanging out there for windsurfing, fishing, and camping. Plus, it was even featured on some Japanese banknotes. So, if you're ever in the area, make sure to check out this awesome spot for some chill vibes and stunning views of Mount Fuji!