If you were ever a child, this has got to fill you with intense envy: this house in Japan has built-in slides that run all the way from the top floor to the ground. The building was created by LEVEL Architects for a family in Nakameguro, Japan.
The inclusion of a slide was the family's foremost request, and it required a unique approach. One side of the house has staircases and a corridor for going up; the other side features a rounded wall with the slide for heading down.
But beyond questions of construction and slope, the architects wanted to make sure they didn't fall into the playground trap: "The biggest challenge was to integrate the slide into architecture without making it look like a playground equipment in the space". Judging by both the futuristic, minimalist look of the finished product, and the excitement on the faces of the kids, it seems like they succeeded.