Design firm Peter Ruge Architeketen has created this stunning design concept called the Sofia Metro Station 20, which is one of the proposals in an international competition calling for a new design for a metro station in Sofia, Bulgaria.

The Sofia Metro Station 20 concept features an innovative ribbonlike, curving canopy that serves as the building's structure. The architects have applied finely cast steel and non-flammable canvas lining to create the smooth, sinuous design of the metro station. Further, the designers at Peter Ruge Architeketen have extended the concourse level of the station to provide more room for passengers in order to reduce congestion. They have also added a shopping center in the concourse that will "capitalize on high passenger flows," says Evolo.