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
Dyrhólaey lighthouse prefabricated in Sweden. The present lighthouse was built in 1927. The light flashes white every 10 seconds. Dyrhólaey lighthouse The Dyrhólaey lighthouse () is a lighthouse located on the central south coast of Iceland. The Dyrhólaey lighthouse consists of a square concrete tower, painted white with red trim. Integral keepers quarters are placed on the left and right sides of the tower. A red metal lantern house is placed on top of the tower. The focal plane of the light is . The overall height of the tower is . The site (but not the tower) is open to visitors.