Today, AD joins architect Beatriz Ramo in Rotterdam to tour The Cabanon, a space that claims to be the biggest smallest apartment in the world. When Beatriz and her husband, Bernd Upmeyer, discovered that a tiny 74-square-foot storage room had become available in their apartment building, they knew it was the start of their next design project. The couple envisioned fitting a whole apartment comprising four rooms into the tiny space. Through the construction of an ingenious wooden insert the couple managed to fit a bathroom, bedroom, kitchen/living space, and even a spa into such a tiny space–compartments fold out when needed and slot perfectly back into place when the resident’s activity changes.