Woraksan National Park is the strong outdoor reason to stay in Suanbo rather than just pass through. The park is known for steep ridges, forested valleys, rock outcrops, and views toward Chungjuho Lake.
Do not treat it as a casual stroll from the bathhouse. Trails can be long, steep, and exposed to seasonal weather, so check transport and conditions before setting out. If you are already in Suanbo, though, this is the day that turns the town from a soak stop into a real mountain base.