 In 1990 , it was added to the National Register of Historic Places . Templeton writes , " Lynde Point exhibits superior stone work in the tapering brownstone walls . Of the three early masonry <unk> in the nominated group , Lynde Point is the latest and its construction is the best documented : two advertisements for construction proposals survive , containing the government 's specifications , and the construction contract as well . Lynde Point also is significant as part of the federal government 's early efforts to improve aids to navigation in Long Island Sound , when the mouths of important harbors and rivers were among the first sites chosen for lighthouse appropriations . " Lynde Point is an active aid to navigation and is not open to the public . The Lynde Point Light was used in the 2005 horror movie Predator Island . 
