Pyramid architecture always catches our attention, and this gorgeous grass-clad example in Japan has us drooling - especially because it actually exists (not usually the case with these types of megastructures). Okay, you caught us - the building, called ACROS, isn't really a pyramid (it's more like a ziggurat), but whatever you call it, you can't deny the awe that its enormous terraced green roof inspires. Alive with 5,000 thriving plants representing 76 species, the mixed use structure that spills into a park serves as a calming oasis for the city of Fukuoka. >>>