1) Bascule bridge 
Danviksbron or, alternatively, Danviksbro (`Danvik Bridge`) is a bascule bridge in central Stockholm, Sweden, connecting the eastern end of Södermalm to the eastern municipality Nacka. Under the bridge, the canal Hammarbykanalen carries the water of Hammarby Sjö over to Saltsjön. The bridge, actually two separate bridges carries the railway S.....