The Little Red Lighthouse, officially known as Jeffrey’s Hook Light, is a small, iconic lighthouse located in Fort Washington Park along the Hudson River in Manhattan, New York City, directly beneath the George Washington Bridge. Built in 1921 (though some sources note its original construction as early as 1880), the 40-foot (12 m) cast iron and concrete structure was originally moved to Jeffrey’s Hook to help guide ships through a treacherous section of the river.
The lighthouse became famous thanks to the 1942 children’s book The Little Red Lighthouse and the Great Gray Bridge by Hildegarde Swift, illustrated by Lynd Ward. With the completion of the George Washington Bridge in 1931, the lighthouse’s light was overshadowed, and it was decommissioned in 1947. However, public outcry—spurred by the book—saved it from demolition, and it was transferred to New York City’s Parks Department in 1951
 
Interesting facts...
Archaeological digs near the lighthouse site uncovered Native American artifacts such as shells, charcoal, and arrowheads, now held by the Smithsonian Institution, revealing the deep historical significance of the site beyond the lighthouse itself