ACROS Fukuoka, Fukuoka City, Japan

From one side, the ACROS Fukuoka building looks like a normal, glass-walled Japanese high-rise office building. But on the opposite side is one of the most impressive green roofs in the world. The building was erected on the very last patch of green in the city center, so architects Emilio Ambasz & Associates wanted to incorporate the green space into the building’s design. The green roof features over 35,000 plants from 76 species and merges with the large park at ground level.