Slussen is Swedish and means "the lock." The lock Karl Johanslussen where boats can pass from Lake Mälaren to the Baltic Sea has given the place its name. Slussen is an ingenious traffic solution built in the 1930's and still in use today. You travel through Slussen by car, boat, bus, train, subway, on foot, on a bicycle or leave it by elevator. Slussen has a subway (underground) station, bus terminals and commuter railway station to Saltsjöbaden. By road you can enter from any of several direction and exit in any of the other directions without crossing the path of other traffic, only merge. If you are too tired to walk the sloping streets or the stairs to the heights of Södermalm you can take the elevator Katarinahissen.