There are a number of famous attractions in and around the city. The most famous attraction is Inuyama Castle on a 40m rise overlooking the Kiso river. This Japanese castle is also known as Hakutei-jō (White Emperor Castle). It was named by the Confucian scholar Ogyū Sorai during the Edo period. It is a four-story structure with two underground levels, although it has only three roofs. The castle was made a Japanese national treasure in 1935 and again in 1952. It the oldest original wooden castle in Japan.