TALLINN, ESTONIA - Just a hi-speed ferry from Helsinki, Tallinn makes a great day trip. But spend at least one night if your schedule allows, this modern city has plenty of medieval charm and several terrific sites.
Take a walk in Parc Güell, which is definitely more than a park. It is a symbol of Barcelona. Unique in the world, Parc Güell is one of Antoni Gaudí's most emblematic works and it's absolutely worth the visit !