Vatnsnes is a peninsula

Peninsula

A peninsula is a piece of land that is bordered by water on three sides but connected to mainland. In many Germanic and Celtic languages and also in Baltic, Slavic and Hungarian, peninsulas are called "half-islands"....

 in Iceland

Iceland

Iceland , described as the Republic of Iceland, is a Nordic and European island country in the North Atlantic Ocean, on the Mid-Atlantic Ridge. Iceland also refers to the main island of the country, which contains almost all the population and almost all the land area. The country has a population...

. It is home to one of the largest seal

Pinniped

Pinnipeds or fin-footed mammals are a widely distributed and diverse group of semiaquatic marine mammals comprising the families Odobenidae , Otariidae , and Phocidae .-Overview: Pinnipeds are typically sleek-bodied and barrel-shaped...

 colonies in Iceland. Examples of such places are Hindisvík and Ósar. Seals have been protected for many years in Hindisvík. A stone hut was built at Ósar on the eastern side of the peninsula for seal watching.

Visitors travelling around the peninsula of Vatnsnes can also visit another landmark, Borgarvirki

Borgarvirki

Borgarvirki lies between Vesturhóp and Víðidalur in the north of Iceland, and at 177m above sea level it dominates the surrounding region. Made out of basalt strata, it has been used as a fortress for centuries. Borgarvirki is a natural phenomenon, altered by humans in earlier centuries...

. It is a volcanic plug

Volcanic plug

A volcanic plug, also called a volcanic neck or lava neck, is a volcanic landform created when magma hardens within a vent on an active volcano. When forming, a plug can cause an extreme build-up of pressure if volatile-charged magma is trapped beneath it, and this can sometimes lead to an...

(gosstapi), and the Icelandic sagas mention that in earlier centuries it was used for military purposes.