The New London Ledge Lighthouse is a unique structure guarding the entrance to Connecticut’s New London Harbor and the mouth of the Thames River. The busy harbor was originally marked by the New London Harbor Light in 1761, however the light was located to far inland to warn of the ledges and shoals on the approach to the harbor. The Light House Board contemplated building a lighthouse at this location since the 1850’s, but it would be another 50 years until their plans were realized.