The Water Temple Hyogo located in Hyogo Japan was built in 1991. Ando Tadao has always loved the use of concrete as his materials. In this exquisite design, he actually designed a little pond on top of the building as a roof.  The building was designed as the residence of the oldest sec of Tantric Buddhism in Japan. I like how Ando Tadao blends some of his buildings with nature. I would think he does that because japan is such a pretty place.