For a day by the water with a difference, make your way to the steaming pools of Ogoto Onsen. This place is renowned for its mineral-rich waters.
This naturally heated water source is on the to-do lists of many travelers to Otsu. But Ogoto Onsen isn't the only drawcard in the area. Mount Hiei, Enryakuji Temple, and Sanzenin Temple are some other worthwhile sights nearby.