Aizu Sazaedo temple is a unique two spiral stairs. Sazaedo is located on Mt. Iimori. The real name is Entsusansoudou, and registered as the national important cultural asset. It was constructed in 1796. There were used to be 33 Kannon Statues in this temple, but they were removed after Meiji Restoration.
Official Web Site: http://www.geocities.jp/aizu_sazaedo/