After taking a night boat cruise from Tallinn to Stockholm, went to one of the most amazing museums today, the Vasa Museum. The story is fascinating with this huge ship, the Vasa, that sunk only minutes into it's maiden voyage (makes the Titanic look good). It is a total engineering failure, and a well-funded one at that. It was at the bottom of the Stockholm harbor for over 300 years when it was salvaged in 1961, in remarkable shape. The museum is incredibly thorough and it's pretty cool to walk in and see the whole thing intact.