Part birdhouse, part treehouse, and part birdwatching station, the aptly named bird-apartment, was created by Japanese design studio Nendo for the Ando Momofuku Center and aims to encourage environmentally friendly nature activities.

The structure, which appears to be one giant treehouse, is actually split from within by a wall, separating 78 birdhouses, from a space for people. This allows for a person to peep in on the chirping nesters through tiny poked holes in the dividing wall without disturbing or scaring them away.

I love that people entering the birdwatching station, do so by entering through a giant hole, similar to the birds’ proportionally smaller entrances on the opposite end.