Only six nautical miles or so from the entrance channel to Copenhagen, the small island of Flakfortet was built on a sandy shoal in the early 1900s as a way to defend the city against attack.
Reinforced concrete pilings were sunk into the sand, and the resulting island was surrounded by a protective seawall. The island was largely a base for a variety of anti-aircraft guns, and the fortifications, gun turrets, and connecting tunnels are still in place.
In the early 2000s, the Danish Navy sold the island, and today it’s largely a day-trip destination from Copenhagen via the regular ferry service. But the area between the island and seawall is perfect for tying up a boat, and Madrone enjoyed a peaceful night there.
