Inisheer Lighthouse

The Inisheer, Inis Oírr or Fardurris Point Lighthouse, is an active 19th century lighthouse located on the island of Inisheer, the smallest of the Aran Islands, in County Galway, Ireland. It marks the south-eastern entrance to Galway Bay and the Port of Galway known as the South Sound, with a red sector of the light marking the Finnis Rock.

The Eeragh Lighthouse which marks the North Sound entrance to the bay on the north-western side of the islands, was also constructed at the same time. Inisheer and Eeragh both became operational in 1857.

Source: Wikipedia