Forgotten New York is a website created by Kevin Walsh in 1999, chronicling the unnoticed and unchronicled aspects of New York City such as painted building ads, decades-old castiron lampposts, 18th-century houses, abandoned subway stations, trolley track remnants, out-of-the-way neighborhoods, and flashes of nature hidden in the midst of the big city. In 2003, HarperCollins approached Walsh with the idea of turning the website into a book; Forgotten New York was published in September 2006.