Summary: A long and thin waterfall, Foss a Sidu (or Foss á Siðu) drops 30m down a sheer basalt cliff. It's located along the Ring Road in southern Iceland.

Foss a Sidu (or to be precise, Foss á Siðu, which means “waterfall at Siðu”), is a very tall and thin waterfall, which is behind a farm that has been inhabited since the 9th century. The river Fossá drops 30m down over a sheer basalt cliff; the cliff line is part of the original sea cliffs 10,000 years ago, before the ocean retreated.

Foss a Sidu

A short distance further and right by the side of the Ring Road are more cascades along the river Jökulsá á Dal (also called the Jökulsá á Brú), which at 150km in length is the longest river in Iceland’s Eastern Region. Behind the river is a great view of the towering old sea cliffs which runs parallel to the coast, about five kilometres inland.

Cascades along Ring Road 1
Cascades along Ring Road 1

According to folklore, a ghost dog named Móri wanders around Foss á Síðu, who cursed a local family for nine generations. Some say Móri has disappeared; others claim he is still wandering around the farm and waterfall. 

Getting to Foss a Sidu

The falls are halfway between Vík í Mýrdal and Glacial Lagoon, and can be seen from Ring Road 1. There’s no car parking area, but you can safely stop by the side of the road. 

More information on Foss a Sidu

This was one of the many waterfalls (and countless other natural attractions) on our week-long Circuit around Iceland.

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