Xstrata Treetop Walkway
See London’s Royal Botanic Gardens at Kew as the birds do—nearly 60 feet above ground. The new 650-foot-long walkway designed by Marks Barfield Architects (designers of the London Eye) allows visitors to meander among the leafy canopies of 50 mature sweet chestnut, lime and oak trees. The weathered steel of the twelve steel trusses, which connect to ten circular platforms, resembles tree bark (Apps.Kew.org/Trees). —Katherine Lagomarsino