The Torelló settlement was one of the largest in the municipal area of Mahón. It is especially well known for the spectacular talaiot (called the Talayot of Torellonet Vell) which is interesting because at the top of the tower you can still see the original doorway and the lintel above it, both of which date from the Talayotic period (1000-700 BCE).
Unfortunately, the structure was damaged by the triangulation pillar and the airport-runway approach lights that were placed on the tower platform. An archaeological dig carried out on the site in the 1980s unearthed lamps dating from the period of Imperial Rome plus the remains of fine Roman pottery.Of all the structures identified in the settlement, the most interesting are a second talayot (much smaller in size); the foundations of several houses; a couple of artificial caves; plus a water catchment system made up tanks or cisterns and channels.
References:Towering 52 meters above the sea, Bengtskär lighthouse is the tallest one in Scandinavia. The building started in in 1905 after the shipwreck of S/S Helsingfors and was completed in 1906. The lighthouse was designed by architect Florentin Granholm. On December a special petrol lantern, designed and built in Paris, was brought to Bengtskär and installed atop the tower.
German fleet bombarded Bengstkär in the First World War in 1914. Since the Gulf of Finland was heavily mined, it was not until 1919 that the surrounding seas were declared safe for shipping, that the light was lit again.
After the war the military value of Bengtskär increased as part of the defence system of independent Finland. In Second World War (1941) Soviet Union made a suprise attack to island. After a bloody battle, the small Finnish garrison emerged victorious. Intermittent repairs to the facility continued during the post-war period.