Stockholm, Sweden. As any capital public transport and infrastructure are a challenge. Clearly visible here at the northern shore of Södermalm with Slussen junctions. Commuter trains, long distance trains, subway trains, busses, cars, cyclists and pedestrians pas through this hub, above or underground. Across the water Gamla Stan, the historic centre, with Riddarholmen with the characteristic Riddarholmskyrka (open tower). Behind it to the left Kungsholmen with the City Hall (Stadshuset) well-known from the Nobel Prize festivities.