Smeaton's Tower Smeaton's Tower Smeaton's Tower is a memorial to celebrated civil engineer John Smeaton, designer of the third and most notable Eddystone Lighthouse. A major step forward in lighthouse design, Smeaton's structure was in use from 1759 to 1877, until erosion of the ledge it was built upon forced new construction. The tower was largely dismantled and rebuilt on Plymouth Hoe in Plymouth, Devon, where it stands today. The Royal Society recommended Smeaton for the task, and he modelled the lighthouse on an oak tree. He rediscovered the use of hydraulic lime, a form of concrete used in Roman times. The
Rivingen Lighthouse flash of light every 5 seconds. The light is white, red, or green depending on the direction. The lights can be seen for up to . The original 1886 tower has been inactive since 1925. The white, square tower was about tall with a sharply pyramidal dark maroon, metallic roof and a spire. The tower is attached to the front of a one and a half story keeper's house. The old tower and house are now a privately owned summer residence which is only accessible by boat. Rivingen Lighthouse Rivingen Lighthouse () is a coastal lighthouse in the municipality of