The G-Cans Project (formally known as the Metropolitan Area Outer Underground Discharge Channel) is the world's largest flood water drain facility located 50 meters below ground in the outskirts of Tokyo, Japan. Built between 1992 and 2009, the massive underground tunnel system is equipped with four jet-powered turbines and five gargantuan water silos that can drain floodwaters at an impressive rate of a 25-meter swimming pool per second.

The Keret House is the world's narrowest house designed by Polish architect Jakub Szczesny and situated in a 3-foot-wide gap between two buildings in Warsaw, Poland. As one can imagine, the wedged home is not without its shortcomings (no windows, ladder access only and very tiny appliances) but at least there's sunlight exposure, thanks to its semi-transparent, polycarbonate walls and ceiling. The Keret House will serve as a temporary home for traveling writers. Interested in moving in? Check out this video of the interior view.

Yi Yvonne Weng's Explorative Canopy Trail is a conceptual design for an ecological research facility that would stay suspended in mid-air by a web of synthetic fibres and steel supports in a tropical jungle, allowing scientists to study and easily harvest the medicinal plants and live out of lightweight pod quarters in the canopy.

HUS-1 is a small portable house (25 square meters / 269 square feet) designed and built by Swedish architect Torsten Ottesjö.

What, no net? One double-bounce and you're making a splash in the River Seine.