Skeppsholmen is one of Stockholm's 14 islands and is accessible by walking or biking from Kungsträdgården past the Grand Hôtel and Nationalmuseum. Public buses also service the island.
In the past, it housed many military buildings, and you'll see remnants—like old torpedoes and canons. But today, be sure to visit museums such as the Museum of Modern Art and the Östasiatiska Muséet (The Museum of Far Eastern Antiquities) alongside theaters and a church.
The af Chapman, a sailing boat now used as a youth hostel, is also docked here. And every year, the Stockholm Jazz Festival is held on this island.