See the splendid castles that give a regal bearing to Copenhagen, home of one of the world's oldest monarchies. The tour includes a one-hour stop at Rosenborg Castle, once the Royal Summer residence and now a treasure-filled museum, and a 45-minute visit to Christiansborg Palace, the Danish Parliament home. You'll also pass by the Tivoli Gardens Amusement park, and stop at the Little Mermaid, the Hans Christian Andersen-inspired sculpture.