Kew Gardens Launches Its New Treetop Walkway

LONDON - MAY 22: People walk along the Xstrata Treetop Walkway at Kew Gardens on May 22, 2008 in London, England. The 18m high Xstrata Treetop Walkway and the Rhizotron, which gives a unique opportunity for for visitors to view a tree's root system from underground, is part of Kew's summer festival and will open on the May 24 to the public. (Photo by Daniel Berehulak/Getty Images)