Day 1 was great - the Vasa Museum

The Vasa was, in 1628, the largest and most advanced warship ever designed and built.  Unfortunately, on its maiden voyage, it foundered and sank 20 minutes after launch.  A little embarrassing, the King being in the attending audience and all.  A sort of Swedish Titanic.  Anyway, it was raised after 333 years underwater.  The museum is utterly amazing.