One of the leading options for summer recreation when in Copenhagen, Amager Strandpark is a revitalized park on Amager Island, where you can see neighboring Sweden across the Oresund. This artificially developed sandbar is where you'll find many of the Danish at play, whether it is frisbee or volleyball on the long, sandy beach or games as unique as kayak polo (yep, the game of polo atop a kayak. Pretty self-explanatory, really) being played in the water. With all of the excitement, why not join in? Beyond the beach, there are also sports fields, playgrounds, facilities, and other basic park amenities.
If you're looking to enjoy a social gathering place outside the city limits, where the active gather for Ironman-style events or strap themselves into wind-driven Blokarts for a romp around the track, while the inactive lie in the sand and watch, then make a stop at Amager Strandpark.