Berlin’s double-decker bridge the Oberbaumbrücke (1895) - Oberbaum Bridge - links the two Berlin districts of Kreuzberg and Friedrichshain separated by the River Spree. Traffic runs on the lower part and trains on the second level. It was built on the site of a previous timber bridge built in 1724 when the construction of an elevated railway required a reinforced structure. The result was a seven-arched concrete bridge with a granite and brickwork façade. It is distinctive architecturally because of its mock medieval turrets – which recall the function of toll bridges and arches.More recently the bridge starred in the Hollywood movie “The Bourne Supremacy” (2004) filmed on location in Berlin. Jason Bourne - played by Matt Damon - is seen crossing the Oberbaum Bridge in a Taxi on his way to the Westin Grand Hotel. A Cold War landmark of division between between east and west from 1961 to 1989 armed guards patrolled the banks of the river as a border area and the bridge was one of the crossover checkpoints from West to East only.