Tomas Saraceno. On Space Time Foam. HangarBicocca in Milan, Italy, 2012.

“… is a multi-layered habitat of membranes suspended 24 meters above the ground that is inspired by cosmology and life sciences. Each level has a different climate and air pressure and will react to the movement of visitors through it. In a later iteration, the work will become a floating biosphere above the Maldives Islands that is made habitable with solar panels and desalinated water.”

More here, here, and here.