Airport reborn as public park

Children ride bicycles on an old airport runway at former Tempelhof airport in Berlin on Sept. 11. Built in the early 1920s in south central Berlin, the aging and obsolete airport was closed in 2008. In an effort to introduce more green space into the city, the space was reopened in May 2010 as a public park called Tempelhofer Freiheit. Because of the large expanses of runway and the ample amount of green space, the park has become a popular venue for recreational activities like biking and skating. (Photo: Sean Gallup/Getty Images)

Community gardening at the Kontor Commons

Visitors relax on Sept. 11 at an urban gardening colony called the Kontor Commons on the site of Berlin's Tempelhofer Freiheit. City officials are currently considering various proposals for the park's future that include adding apartment buildings on the outskirts and adding a new subway stop for better access. (Photo: Sean Gallup/Getty Images)