Moskstraumen, a maelstrom in the Norwegian Sea, has inspired everyone from Mercator to Edgar Allen Poe, Jules Verne and Cixin Liu. It was first depicted in the Carta marina, Olaus Magnus’s 1539 map of Scandinavia, and has been terrifying sailors ever since.

Across Vestfjorden there’s another strong tidal current, Saltstraumen: https://en.wikipedia.org/wiki/Saltstraumen

«Saltstraumen has one of the strongest tidal currents in the world.

Up to 400 million cubic metres (110 billion US gallons) of seawater[5] forces its way through a 3 km (1.9 mi) long and 150 m (490 ft) wide strait every six hours.

Vortices known as whirlpools or maelstroms up to 10 m (33 ft) in diameter and 5 m (16 ft) in depth are formed when the current is at its strongest. At this point, one source claims that the tidal current can reach 40 km/h (25 mph). (…)

The remains of a 10,000-year-old hunter settlement in the area are the oldest known traces of human settlement in Bodø, and also one of the oldest archaeological discoveries in Norway. These hunters lived on the edge of the ice, attracted by the abundance of fish caused by the strong currents.»