Tags: Lighthouse, Tower.
Built in 1844 by the Royal Engineers the Gibbs Hill Lighthouse is the taller of two lighthouses on Bermuda and one of the first lighthouses in the world to be made of cast-iron. This is because at that time steel still was not able to be bent. The optic consists of a Fresnel lens from 1904 revolving on steel bearings. However for most of its history the lens revolved on a bed of 1200 pounds of mercury.
