185 steps to the top. Constructed in 1844 the Gibbs Hill Lighthouse is the oldest cast iron lighthouse in the world. The hill on which the lighthouse stands is 245 feet high while the lighthouse itself measures 117 feet. A 1,000 watt bulb sits inside a lens revolving in a trough of 1,200 pounds of mercury. The light beam it emits can be seen by ships 40 miles away and from a distance of 120 miles by a plane flying at 10,000 feet. While you’re there, check out the panorama from Queen’s View. It’s named after Queen Elizabeth II who paused here in 1953 to wonder at the scenery. A commemorative plaque in the grounds marks the spot.