With a number of bridges connecting the various districts, the cityscape is characterised by parks, promenades and waterfronts.
Copenhagen's landmarks such as Tivoli Gardens, The Little Mermaid statue, the Amalienborg and Christiansborg palaces, Rosenborg Castle Gardens, Frederik's Church, and many museums, restaurants and nightclubs are significant tourist attractions.
The Copenhagen-Ringsted Line will relieve traffic congestion.
With the establishment of the Kalmar Union (1397–1523) between Denmark, Norway and Sweden, by about 1416 Copenhagen had emerged as the capital of Denmark when Eric of Pomerania moved his seat to Copenhagen Castle.The Copenhagen Metro launched in 2002 serves central Copenhagen while the Copenhagen S-train and Lokaltog (private railway) and the Coast Line network serves and connects central Copenhagen to outlying boroughs.To relieve traffic congestion, which is partly the result of increased traffic because of the Fehmarn Belt Fixed Link road and rail construction is planned because the narrow 10 mile isthmus between Roskilde Fjord and Køge Bugt (Køge Bay) forms a traffic bottleneck.The annual Copenhagen Marathon was established in 1980.Copenhagen is one of the most bicycle-friendly cities in the world.
After further disasters in the early 19th century when Nelson attacked the Dano-Norwegian fleet and bombarded the city, rebuilding during the Danish Golden Age brought a Neoclassical look to Copenhagen's architecture.