Hiroshima Peace Memorial (Genbaku Dome)

In 1995, the collection of A-frame buildings centered on Shirakawa-go in Shirakawa Village, Ono-gun, Gifu Prefecture, and Gokayama in Nanto City, Toyama Prefecture, became Japan's sixth World Heritage.
Called gassho-zukuri (praying hands) in Japanese, this A-frame structure is one of Japan's traditional architectural techniques for the building of homes, getting its name from the high-peaked roofs that give the appearance of two hands being pressed together in prayer. The structure is characterized by its sharply sloping thatched gabled roof, and the high ceilings provide excellent ventilation and allow plenty of light into the home.
The regions get some of the heaviest snowfall in Japan, and it is believed that the neighborhoods of giant A-frame buildings developed because of the prospering of the silkworm industry that requires plenty of light and ventilation.