Akerøya is an uninhabited island in the

Hvaler Hvaler is a municipality that is a group of islands in the southern part of Viken County, Norway. The administrative centre of the municipality is the village of Skjærhalden, on the island of Kirkeøy. The only police station in the municipali ...

island chain in

Østfold Østfold is a traditional region, a former county and a current electoral district in southeastern Norway. It borders Akershus and southwestern Sweden (Västra Götaland County and Värmland), while Buskerud and Vestfold are on the other side o ...

, Norway. The

island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island ...

has an area of 1.6 km². On the islet Festningholmen near Akerøya is Akerøya Fort which from the 17th century was part of the

fortification A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere'' ...

s of

Fredrikstad Fortress Fredrikstad fortress (''Fredrikstad festning'') was a fortification in Fredrikstad, Norway. It was the base of the Østfold Regiment, with defence related responsibilities for the east side of Oslofjord. History Fredrikstad Fortress was construct ...

. Akerøya was protected as a

nature reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, or features of geological or ...

from 1978, and is included in the

Ytre Hvaler National Park Ytre Hvaler National Park ( no, Ytre Hvaler nasjonalpark, literally ''Outer Hvaler National Park'') is a national park located within the municipalities of Hvaler and Fredrikstad in Østfold, Norway. The park was established on 26 June 2009 and w ...

from 2009.

References

Hvaler Uninhabited islands of Norway Islands of Viken (county) {{Viken-geo-stub