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Collider Activity Center

Walltopia Ltd was founded in 1996 as a manufacturer of artificial climbing walls and climbing holds. Over the last 16 years, the company has become the global leader in its field, supplying its products to every country in the world where climbing is popular - including all West European countries, USA, Canada, Japan, Australia, etc.

In 2013 Walltopia announced an architectural competition for the design of its new corporate headquarters and activity center in Sofia, Bulgaria.

CORE's entry submission focused on a sliding glass curtain wall design that allowed for the removal of the traditional division between interior and exterior spaces.