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You don't always need four walls and a roof to create "architecture", as proven by Claude Cormier through his landscape architecture installation designed for the summer-long Aires Libres festival in Montreal. Cormier artfully suspended 170,000 pink balls from the trees and buildings lining the festival street to create the "roof" surface of this 1.2 km-long space. The layering, density, and intertwinement of the "artificial pink foliage" creates varied feelings of openness and enclosure as the light filters through.
Check out more photos here.