Admission is free to this National Historic Site, which is formally open June 1 to August 31 (if you want to see inside the blockhouse itself.) You can visit the site year-round, however, and enjoy the cannons, plaques, and views of the Bay of Fundy. The blockhouse is one of the few surviving British fortifications built during the War of 1812.
23 Joes Point Road
Saint Andrews, NB