Blackwell Island Light - Credit: Wikimedia Commons
Blackwell Island Lighthouse, now known as Roosevelt Island Lighthouse, also was known as Welfare Island Lighthouse, is a stone lighthouse built by the government of New York City in 1872. See also: It is within Lighthouse Park at the northern tip of Roosevelt Island in the East River. It was named to the National Register of Historic Places on March 16, 1972 and was designated a New York City Landmark on March 23, 1976. Read more on Wikipedia
Source: en.wikipedia.org