The incredible Vasa battleship was intended to be the pride of the Swedish Imperial fleet, yet in a forerunner of the Titanic disaster centuries later, sank on its maiden voyage in 1628. An amazing salvage operation took place in 1961, and now you can marvel at this glorious time capsule, 95 percent of which is entirely original. The three masts on the roof of the museum are not just a tourist draw; they were reconstructed to the exact height and specifications of the original masts. This is the most visited museum in Sweden, and rightfully so.