Gripsholm Castle

This fortified castle, which dates from 1537, is situated on Lake Mälaren in Mariefried, forty-three miles southwest of Stockholm. The centerpiece is the circular theatre, an elaborate confection of gilt and mirrors built in the neoclassical style during Gustav’s reign. Today it is still magical, and it’s one of the best-preserved period theaters in Europe. In summer, it’s especially lovely to take the ferry (call Mariefreds Ångfartygs AB: 46-8-669-8850) here from City Hall.