The David Rockefeller Linden Terrace is located at the Promenade's northern end, on the site of Fort Tryon and Tryon Hall. The terrace is located above sea level, the highest location in Fort Tryon Park. It is also the highest landscape feature on Manhattan Island, as measured by the distance between ground level and sea level. However, Linden Terrace is not the island's highest natural point, which is located within Bennett Park a few blocks south, above sea level. Linden Terrace is supported with stone retaining walls of up to tall. It comprises a main observation deck and the smaller Northeast Terrace, which are linked by an arch across a passageway below. In the early 21st century the terrace was renamed after John D. Rockefeller Jr's last surviving child David, who had donated $1 million toward the park.