Hook Lighthouse
The Hook Lighthouse (; also known as Hook Head Lighthouse) is a building situated on  Hook Head at the tip of the Hook Peninsula in County Wexford, in Ireland. It is one of the oldest lighthouses in the world and the second oldest operating lighthouse in the world, after the Tower of Hercules in Spain. It is operated by the Commissioners of Irish Lights, the Irish Lighthouse Authority, it marks the eastern entrance to Waterford Harbour. The current structure has stood for 846 years as of 2018.
Hiiu County
On demands of the Hanseatic League a lighthouse was built in Kõpu in the beginning of 16th century (previously known as "Dagerort"). It is considered the third oldest continuously operating lighthouse in the whole world, still showing its light to 35 miles to the sea.