Inland, the parish is also home to Jersey's most noted archaeological site at La Hougue Bie, now a museum run by the Jersey Heritage Trust. A prehistoric artificial mound covers a passage grave aligned for the equinox. A mediaeval chapel, Notre Dame de la Clarté, built on the Neolithic mound was converted in the 18th century to a folly-like Gothic Revival residence, the Prince's Tower (demolished in the 1920s). During the German occupation of the Channel Islands in the Second World War, the German forces and imported labourers constructed bunkers in and alongside the ancient mound, now also transformed for museum interpretation.