The glowing structure above is the Polideportivo in San Indioteria – a pair of sports courts within a polycarbonate shell designed by Jordi Herrero and Sebastian Escanellas. Featuring a striking design, the project has a multi-colored polycarbonate shell that fills the courts with richly-hued light during the day and glows brilliantly at night.
Boxy and irregular, the shell cantilevers off of the Southeast and Southwest faces of the building to shade the glass below, preventing solar heat gain via longwave radiation. But the architects may have been more interested in how the cantilever creates a smooth transition between the inside and outside of the building, as each talks on his website about an imperceptible transition between inside and out. However subtle that transition may be, the vibrant boundary floating above is stealing the show.
Found through ArchDaily