For a natural experience of a different kind, make your way to the steaming pools of Utsukushigahara Onsen. This place is renowned for its mineral-rich waters.
When you've finished exploring this Matsumoto naturally heated water source, why not check out Matsumoto Castle, Matsumoto Performing Arts Center, and Asama Hot Spring? They're near Utsukushigahara Onsen and also a hit with travelers.