While sailing from Stockholm archipelago to Aland islands we decided to visit Lagskar island. We arrived late in the evening, parked our sailing catamaran at the beach and went to lighthouse which was open so we climbed to the top to enjoy the scenery. Spent the night aboard our catamaran and next day did a more detailed exploration of the island. Since there was no geocache I decided to hide one because I really liked the island, it probably is one of my favorite small islands in the Baltic sea. Below is some info about Lagskar island and the lighthouse I found on Wikipedia.

Lågskär (Swedish for "low skerry") is a small island within the Åland Islands archipelago of Finland. It belongs to the municipality of Lemland. It is situated about 24 kilometres (15 mi) south of Mariehamn in the Baltic's Sea of Åland. The main island of Lågskär measures 61 hectares (150 acres) in area. Rock stacks, sea cliffs and rocky shores are found along the coastline of the island. As a breeding ground for waterfowl, Lågskär has the status of an Important Bird Area (IBA) and is frequented by ornithologists who use the Lågskär Lighthouse buildings during their stay. In the past, several vessels have sunk off the coast.

History

The earliest habitation on the island was linked to a cairn and a wooden beacon that existed on the island during the 1600s and 1700s. In the 1840s, when the first lighthouse was constructed to replace the beacon, there were 20–30 inhabitants comprising the families of the lighthouse keepers.  In addition to rearing livestock, fishing, and hunting wildlife, the families ran a school for their children; a lighthouse society functioned at the time. The wooden lighthouse was remodeled into a stone structure which was destroyed during World War I. The existing lighthouse, built in 1920, introduced a rotating gas lighting device, noted as the first of its kind in the world.  After the lighthouse was automated in 1961, the lighthouse keepers vacated the island.  It is uninhabited since.

On 11 April 1918, the German Nassau-class battleship SMS Rheinland ran aground in heavy fog during World War I.  In 1934 or 1935, the German vessel Frida sprang a leak and sank off Lågskär, but the crew survived.  On the evening of 21 October 1942, Finnish submarine Vesihiisi torpedoed and sank the Soviet S-class submarine S-7 near Lågskär.

Geography

The island comprises a mix of greenery and rocky areas, with the thickest vegetation towards the centre.  Rock stacks, sea cliffs and rocky shores are found along the coastline. There is a small sandy beach at the north west side. Near the island, particularly to the south, there are rocky islets and rocks, including Sundbloms Grund, Söderkläppen and Österkläppen.  To the east are Kalvskär and Norra Kalvskär.

Nature and wildlife

The Björkör-Lågskär area, measuring 6,097 hectares (15,070 acres) in size, is part of a Ramsar Site, while the Nyhamn-Lågskär islands area, measuring 2,879 hectares (7,110 acres) in size, is recognized as an Important Bird Area (IBA) since 2000.  A Birds Directive designation for 1,079 hectares (2,670 acres) overlaps the IBA site.

Lågskär is occasionally visited by ornithologists for birdwatching,  and to operate a bird ringing station which was established in 1964. They use the abandoned buildings during their stay.  The island has been identified by Alula, the Finnish birding magazine, as “one of the most important breeding bird islands of the Finnish Baltic Sea”.  On the island are Steller's eider (Polysticta stelleri), the key bird species, and razorbill (Alca torda). Other breeding species recorded are: Mute swan (Cygnus olor), greylag goose (Anser anser), tufted duck (Aythya fuligula), gadwall (Anas strepera), black guillemot (Cepphus grylle), razorbill (Alca torda), guillemot (Uria aalge), water rail (Rallus aquaticus), colonies of gulls (Larus spp.), terns (Sterna spp.) and the white-tailed eagle (Haliaeetus albicilla).

Despite harsh conditions, the vegetation on the island is fairly diverse. Following the island's grazing ban, vegetation has become very thick and has resulted in it becoming a breeding ground for waterfowl.  There is large reed bed in the small lagoon area.

Fish species reported in the late 19th century in a small rock pool of 9 by 4 metres (30 ft × 13 ft) in size continue to flourish. Carassius carassius of lengths varying between 8.7–11.7 centimetres (3.4–4.6 in) is found along the coastline,  and in a 1993 study, some 18 species of macroalgae were recorded at depths varying between 4–7 metres (13–23 ft). The species reported include Pilayella littoralis, Ectocarpus siliculosus, Fucus vesiculosus, and Rhodomela confervoides, followed by a lesser number of Sphacelaria arctica, Cladophora rupestris, Stictyosiphon tortilis and Polysiphonia fucoides than in a previous 1950s study.

Wetlands International has identified the island as a wetland.  The Middle Åland Sill, one of three sills in the two basins of the Åland Sea, measuring 70 metres (230 ft) width, is situated between Söderarm and Lågskär and separates the two basins of the Åland Islands.

Lågskär Lighthouse

Lågskär Lighthouse is an automated lighthouse located on the north side of Lågskär, one of Finland's Åland Islands in the Sea of Åland of the Baltic. It is the only striking feature on Lågskär on the generally uninhabited island.

The 23-metre (75 ft) lighthouse is designed as a concrete tower, square in shape, with a lantern and gallery. The lens has a focal plane of 42 metres (138 ft) with white light flashing every 12 seconds. The light has run on wind power since 1986. While the ground floor of the site is open, the tower itself is closed. It is maintained by the Finnish Maritime Administration, and the buildings are often let out to ornithologists studying on the island.

History

A wooden lighthouse was built in 1840 on northwestern tip of the island and was rebuilt in 1859 as a masonry structure. During World War I, it was destroyed by Russian bombardment. A temporary structure was erected thereafter. The present lighthouse was constructed in 1920. It introduced a rotating gas lighting device, which was the first of its kind in the world.

There is a commemorative postage stamp of the Lågskär Lighthouse, part of Åland's "Lighthouses series", with a denomination of 2.10 Finnish markka (fm). It was issued on 8 May 1992 and remained valid until 30 June 2002.

Architecture and features

The 23-metre (75 ft) light is designed as a concrete tower, square in shape, with a lantern and gallery. The tower is painted red and the lantern white. There is also a 1.5 storey keeper's house and other light station buildings. It is a functional navigational guide and has a range of 11 nautical miles (20 km; 13 mi). The lens has a focal plane of 42 metres (138 ft) with white light flashing every 12 seconds.  The lighthouse has run on wind power since 1986. Since automation, the outbuildings and the tower have been used as an ornithological station.