Svenska Högarna is a small group of island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

s and a lighthouse

Lighthouse

A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses or, in older times, from a fire, and used as an aid to navigation for maritime pilots at sea or on inland waterways....

 located east of Möja

Möja

Möja is an island in the Stockholm archipelago in Sweden. Möja is one of the most popular islands in the archipelago for travellers and boaters, and is also significant in size....

 in the Stockholm archipelago. The lighthouse is located on the largest island Storön, and is the only lighthouse in Stockholm archipelago with the classic iron design of architect Nils Gustaf von Heidenstam. Before the lighthouse was built there had been a checkered day beacon

Day beacon

A day beacon is an unlighted nautical sea mark. Typically, day beacons mark channels whose key points are marked by lighted buoys. Day beacons may also mark smaller navigable routes in their entirety. They are the most common aid to nautical navigation in shallow water as they are relatively...

 on the island, it is now located at the island of Storkläppen in Östergötland

Östergötland

Östergötland, English exonym: East Gothland, is one of the traditional provinces of Sweden in the south of Sweden. It borders Småland, Västergötland, Närke, Södermanland, and the Baltic Sea. In older English literature, one might also encounter the Latinized version, Ostrogothia...

. Svenska Högarna lighthouse was lit in 1874 with a colza oil

Colza oil

Colza oil is a nondrying oil obtained from the seeds of Brassica rapa, var. oleifera, a variety of the plant that produces turnips. Colza is extensively cultivated in France, Belgium, the United States, the Netherlands and Germany and Poland. In France, especially, the extraction of the oil is an...

 lamp. In 1887 a paraffin

Paraffin

In chemistry, paraffin is a term that can be used synonymously with "alkane", indicating hydrocarbons with the general formula CnH2n+2. Paraffin wax refers to a mixture of alkanes that falls within the 20 ≤ n ≤ 40 range; they are found in the solid state at room temperature and begin to enter the...

 lamp was installed, in 1966 it was electrified and in 1986 solar cell

Solar cell

A solar cell is a solid state electrical device that converts the energy of light directly into electricity by the photovoltaic effect....

s were put in use to generate power.

The island is staffed with a weather station. Since 1994 the lighthouse is owned by a foundation called "Edward Sjöbloms stiftelse". All of the islands are a nature reserve

Nature reserve

A nature reserve is a protected area of importance for wildlife, flora, fauna or features of geological or other special interest, which is reserved and managed for conservation and to provide special opportunities for study or research...

. On the islands you can also observe two giant's kettles
The isolated islands are not easy to reach: the weather must be very calm in order to moor boats safely to the rocky shores.