The Sandy Hook Lighthouse, located about one and a half statute miles (2.4 km) inland from the tip of Sandy Hook, New Jersey, is the oldest working lighthouse in the United States. It was designed and built on June 11, 1764 by Isaac Conro. At that time, it stood only 500 feet (150 m) from the tip of Sandy Hook; however, today, due to growth caused by littoral drift, it is almost one and a half miles (2.4 km) inland from the tip.