There used to be a lot of heavy industry in Berlin – not anymore. Many former factories are turned into lofts, warehouses into offices, breweries into community centers, and railroad yards – into parks. Many railway stations were destroyed in the war (such as Anhalter Bahnhof which remains as a ruin to this day), and many miles of railroad tracks were no longer used. So nature took its course. A good example is the Südgelände (Southern compound), a 44-acre park and nature preserve where train tracks are overgrown by trees and where rare vegetation and wildlife not common to urban areas are to be found. This park is not known to many Berliners, let alone tourists, even though it’s one of the city’s greatest treasures.