One of Tokyo’s modern architectural masterpieces, the National Art Center in Roppongi is best known for its huge front facade resembling a huge glass wave. To most people’s surprise, it is not a museum, but a space for hosting temporary exhibitions of art. Many important exhibitions of historic artists as well as contemporary designers (like Issey Miyake) have been on display here. Because it is not a museum, visitors may enter the building without a fee, which is a must for lovers of contemporary architecture. Soak in the ambience and if you feel moved, check out one of the current exhibitions. Closed Tuesdays.