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Another of Copenhagen's old fortifications, which has been turned into an attractive park. Other than the outline, moat, walls and a few buildings remaining, there is not much to see here in terms of history. But there are some nice views over the sound and you can venture into the open part of the catacombs and see bullet holes from Nazi executions during WWII. A stroll here is easily combined with a visit to Amager Strandpark (see Do section), but otherwise probably not worth the effort.
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Amager Beach
Probably the largest beach in the near vicinity of Copenhagen, artificially constructed some years back. Includes a large sand island and an inner lagoon. There is usually a good range of activities going on, even outside the bathing season, such as windsurfing, diving, water skiing, sea kayaking and some hugely popular beach volleyball fields. If you're visiting during winter you have a chance to show your inner Viking with winter bath on the New Helgoland pier.
Set in a beautiful old mansion-like country home from the 18th century, this museum displays a large collection of graphics from mainly Danish artists, including a large collection of the somewhat internationally known Cobra artists. There are also a temporary exhibition space.
National Aquarium Denmark
Largest aquarium in Northern Europe with 20,000 fish and ocean animals from all over the world.
Copenhagen Concert Hall
Part of the public broadcasters new and problem ridden headquarters in Ørestad, this gem designed by French architect Jean Nouvel is the main reason behind the massive budget overruns of the project — with its final price tag approaching USD 300 million, it is among the most expensive concert halls ever built.
Copenhagen Congress Center
Copenhagen's prime exhibition and convention center, with over 123,000 m² of exhibition space. Fairly often there is an exhibition and event of some interest to the general public — check the current schedule on their website..
Ski slope on top of the huge "Amager Bakke" incineration plant. You can ski, hike, climb, walk up the steps, etc. Or you can just take the elevater up, order a drink at the rooftop bar and enjoy the great view of copenhagen.