Barcelona-based Penique Productions is an artist collective founded in 2007 that creates transformative installations in public spaces. To do this the group utilizes massive plastic balloons that are inflated inside buildings and other interior areas. Coupled with exterior lighting that illuminates the colored plastic, the results can be beautifully dramatic, making the new environment almost unrecognizable from the actual space.
You can see many more views of several installations on their website, and almost all of them are accompanied by videos that document the process. Penrique has upcoming projects next month at both the UB University in Barcelona, and at Galeria N2.