Go for a walk or stop for a picnic at Onioshidashi Volcanic Park. You can choose your own adventure at this lovely recreational area.
You'll have sightseeing choices galore when staying in Tsumagoi. Onioshidashi Volcanic Park is a great place to kick off here, but there are lots of other interesting spots to enjoy. Mount Asama, Karuizawa Toy Kingdom, and Karuizawa Snow Park are not far from the outdoor recreational space and will round out your day nicely.