Swap - Arrived: 2017.02.14 --- Trollhättan is a city and the seat of Trollhättan Municipality, Västra Götaland County, Sweden. Trollhättan was founded on the river Göta älv, at the Trollhättan Falls. The site was first mentioned in literature from 1413. The name Trollhättan is translated as "troll's bonnet". The latter part "hätta" could also mean mountain top.