Smeaton's Tower stood were becoming eroded. Each time a large wave hit, the lighthouse shook from side to side. Smeaton's Tower ceased operation in 1879 with the illumination of Douglass's Tower on an adjacent rock. In 1882 the upper part of Smeaton's Tower was dismantled and rebuilt as a memorial to Smeaton on a new base on Plymouth Hoe, replacing the triangular obelisk that had been built there by Trinity House as a navigation aid in the early 19th century. It was opened to the public by the Mayor of Plymouth on 24 September 1884. The foundation and stub of the old
Grønningen Lighthouse Grønningen Lighthouse Grønningen Lighthouse () is a coastal lighthouse in the municipality of Kristiansand in Vest-Agder county, Norway. The lighthouse sits on an islet in the Kristiansandsfjorden, and it marks the eastern side of the main shipping channel that leads inland to the port of the city of Kristiansand. The other lighthouse, which marks the western entrance, Oksøy Lighthouse, lies about to the west. The tall square concrete tower is white with a red roof. It is attached to one end of a 1-1/2 story lighthouse keeper's house. The light sits at an elevation of and it emits two white,