Jikka, the innovative home for Japanese seniors ~ This cluster of five hilltop teepees in Japan's eastern Shizuoka prefecture, 115 miles from Tokyo, is actually a private retirement home. Worried that in the future someone would have to take care of them, it was built by Nobuko Suma & Sachiko Fujioka, two women in their 60s. The design took into account their residents' future: there are no stairs in the property, while the spiral-shaped bath was built with a ramp for wheelchair access.