Carlstens Fastning played an important defensive role over the years. Now a historic attraction, you can only imagine some of the spectacles its mighty walls have witnessed.
When you've finished up at this history-filled fortress in Marstrand, why not check out Pater Noster Lighthouse, Marstrand Church, and Rönnäng Jetty? They're not far from Carlstens Fastning and also popular with travelers.