APTOPIX Singapore Supertrees

People are silhouetted on the OCBC Skyway linking the Supertrees, ranging from 25-50 meters in height and serving as vertical gardens in the nearly completed Gardens By The Bay just next to Singapore's busy financial district on Monday April 30, 2012 in Singapore. This is part of the city-state's efforts to bring and nurture greenery within the city and capture the essence of Singapore as a tropical city.(AP Photo/Wong Maye-E)