Gasparilla Island Rear Range Light located in Boca Grande, Florida-USA.
A rear range lighthouse is used in the same way that you line up the sights on a gun. When one lighthouse is directly behind the other, then a captain knows he is in the middle of the channel. The Gasparilla light serves this purpose. Built in 1891 in Delaware. Moved to Gasparilla Island in 1927,
it stands 105 feet tall and had to be moved once because the beach had eroded dangerously close to it.
It is listed in the Inventory of Historic Light Stations
Florida Lighthouses .