Hadrosaurus Foulkii Leidy Site in Haddonfield, Camden County, New Jersey, United States, is where the first relatively complete set of dinosaur bones were discovered in 1838, and then fully excavated by William Parker Foulke in 1858. The dinosaur was later named Hadrosaurus foulkii by Joseph Leidy. The site lingered in obscurity until 1984 when a local Boy Scout from Troop 65, Christopher Brees, as part of an Eagle Scout project researched the site and generated publicity, eventually leading to the species being designated the official dinosaur of New Jersey. The site is now a small park known as "Hadrosaurus Park" and is accessed at the end of Maple Avenue.