Dueodde Lighthouse
The Dueodde Lighthouse () is located on the Danish island of Bornholm. It was built during the years 1960–62 and commissioned on 15 August 1962. It is in height, with a focal height of . It is the nodal point of the southeast coast line, warning ships to keep away from the extreme southern tip of the island. Dueodde Lighthouse is Denmark's tallest lighthouse and one of the most important lighthouses of the Baltic Sea. Geography. Bornholm features varied topography, such as Almindingen, Hammeren, Jons Kapel, Paradisbakkerne, Rytterknægten, and Dueodde. The lighthouse was built on the western side of  Dueodde's sand dunes, on the island's extreme southern tip. Construction. The foundation for the tower consisted of long reinforced concrete piles which involved two harsh winter seasons to complete. Water for the construction was drawn from the Baltic Sea using a long pipe line laid over the hill slope. After the completion of the foundation, the tower construction was taken up and completed speedily using sliding form work procedure to raise the hexagonal shaped cylindrical concrete tower to a height of without the fixtures. Materials used for construction included of cement concrete and 50 tonnes of reinforcement steel . Architecture and fittings. The lighthouse is equipped with a Fresnel Rotary lens at a focal height of 48 m. Together with its lantern and double gallery, the tower has a total height of . The Fresnel lens (1886) of the Dueodde Nord lighthouse was transferred to this tower. Electric supply of 1,000 watt is provided by the public utility as the illumination source for the incandescent lamp, which, together with the lens and the height of the burner provides a visual range of about . The lens provides three white flashes every ten seconds. There are 197 steps to the top of  the tower from where there is a panoramic view, weather permitting, of the sea and the sandy white beaches. It is the only lighthouse on Bornholm that is open to the public, but at irregular times.