Town Brook is a 1.5-mile (2.4 km) stream in Plymouth, Massachusetts that provided drinking water to the Pilgrims who made their homes adjacent to the brook on Leyden Street in Plymouth. Town Brook's headwaters are the Billington Sea, a 269-acre (109 ha) freshwater pond. The brook passes through numerous small ponds, including Deep Water Pond and Jenny Pond. It also passes by the Jenney Grist Mill and the Brewster Gardens before emptying into Plymouth Harbor.