People who never look inside Tokyo firm Kochi Architect Studio's "Kame House" will miss the madness that is what you see above. The two-story home, which looks totally boxy and vanilla on the outside, hides a giant hexagonal void in its center. The result is a mind-blowing space—with very little privacy. But that's the point. As Designboom explains, the opening is supposed to foster a "communal way of living" and "visually connect the dwelling's various rooms," including a kitchen and bedroom on the upper level and a bathroom and guest room on the ground level.
The diamond-like cavity features several triangular facets, which look a lot like the interior of this whimsical modern take on the teepee, also hailing from Japan. Here's a closer look: