The fortress (Carlstens fästning), begun shortly after the Treaty of Roskilde (1658), overlooks the town and offers a splendid view of the coast and neighbouring islands.
Address:442 67 Marstrand
Phone:+46 303 602 65
Price:85 sek (children 40 sek)
end Jun-mid Aug: 11am-6pm; Jun and mid Aug-end Aug: 11am-4pm; rest of year: telephone for timetable - closed Midsommar