Kotohira

Built in 1835, this kabuki playhouse is the oldest remaining in Japan. It was designated an Important Cultural National Property in 1970. You can get a surprising amount of access to almost the entire theater, including the elevated walkway, trapdoor, revolving stage, and actors' changing rooms. English pamphlets are available.

Stop in if you need a soak after the walk up to Kompira-san — or, if you're really sore, switch your accommodations to one of the several hotels that comprise this hot spring "village".