The Sea Bright–Monmouth Beach Seawall is a seawall located along the Jersey Shore in the Monmouth County, New Jersey towns of Sea Bright and Monmouth Beach. It roughly runs north-south direction along 4.7 miles (7.6 km) of the barrier spit of land along the lower Sandy Hook peninsula between the Atlantic Ocean and the Shrewsbury River estuary. The use of seawalls, groins, jetties, bulkheads, revetment, and beach nourishment since the late 1800s has made the stretch of coast one of the most heavily engineered sections of ocean shorefront in the world.