Designated as a national city park, the island of Djurgarden is a wonderland in the middle of Stockholm: A haven for natives and tourists alike. Djurgarden attracts 10 million visitors every year to its museums, open areas and amusement park (for the kids, of course).
The fun-per-square-meter ratio is off the charts! The island contains the Skansen; the world-famous Vasa Museum, displaying a full-size 17th-century ship; Rosendal Palace; the Aquaria Water Museum, complete with artificial rainforest; and the Nordic Museum, among many other attractions.
Once you're finished with all that learning, take the restored Djurgarden Line tramway to Grona Lund and get those facts rattled right out of your head on a rollercoaster!