Benesse House Art Museum
Naoshima is a small fishing island off the southern Japan coast on the Seto Inland Sea, between Honshu and Shikoku, within eyeshot of the city of Takamatsu.
During the 1990s, the Benesse Corporation, a Japanese textbook publisher, partnered with architect Tadao Ando to create Benesse Art Site Naoshima, a series of spectacular contemporary art museums designed around the theme of "Nature and Art." (There's a nice summary of the place here.)
Shrewdly, they also built the museums with hotel rooms in which visitors can stay.
No less shrewdly, we stayed. It was superb.