At the mouth of the Göta älv, squat red Elfsborgs Fortress was built in the 17th century to keep out the marauding Danes and saw action again in the early 18th century during the Great Nordic War. Tours take in the church built for Karl XII’s troops, the dungeons that discouraged escape by swimming and the original tower.
Strömma runs boat trips and guided tours three to four times daily from May to mid-August from Lilla Bommen harbour.
