Barcelona-based Penique Productions, creates transformative installations in public spaces. To accomplish this feat, the group utilizes massive plastic balloons that are inflated inside of buildings and other interior areas. With exterior lighting that illuminates the colored plastic, the resulting interiors are beautifully dramatic and bear resemblance to what you often find in fantasy art.
On their website, you can find several other installations created by the artist collective with videos documenting their process. Penique has upcoming projects at both the UB University in Barcelona, and at Galeria N2.