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Located in the heart of Sofia, Bulgaria, the Collider Activity Center Four Faces building is meant to bring the city's community together through athletic activities. This communal space boasts a futuristic and inspiring design concept conceived by Hyuntek Yoon, Soobum You and the rest of the team at Atelier WHY architecture firm.

Whether focusing on its colorful glass facade or its impressive interior elements like an oversized rock wall and public lounge areas, this structure is a climber's dream.

The Collider Activity Center Four Faces building is a multi-purpose sport pavilion that is made up of countless cubed volumes. This layered, linear structure employs inventive design principles and will strongly rely on the latest in building technology when reaching its construction stage.