Kastrup Sea Bath, or The Snail as the locals call it, is the most beautiful construction for outdoor swimming in Copenhagen.

Built in 2005 entirely out of azobe, an African wood that is harder than steel and never rots or attracts woodworm, the sea bath offers Copenhageners a great spot for swimming, sunbathing, and sometimes even kayaking.

The 750 square-metre conch-like structure has diving towers, lots of space to lie about in, and an amazing view over the sea and Øresund bridge to Sweden.

It’s won awards for its design, and at night is illuminated by coloured lights. Still not done with the wonders of the sea? Then go to the nearby Blue Planet, the new aquarium with more than 450 species of marine animals, including hammerhead sharks, poisonous frogs, and sea otters, and which is a spectacular architectural experience in its own right.