Lydekker Park is a 3-acre (1.2 ha) park in Harpenden, Hertfordshire. The land was formerly part of the garden of Harpenden Lodge, built in 1803, home for many years to the Lydekkers, one of the town's oldest families. In 1937 Hilda Lydekker, last surviving member of the Lydekker family, entered into an agreement with the former Harpenden Urban District Council that the 11 acres (4.5 ha) of land attached to Harpenden lodge should become an open space for the people of Harpenden. Her intention was that the open space should be a memorial to her two brothers and her fiancé, all of whom died in World War I.