50°22′08″N 4°43′50″W / 50.3689°N 4.7305°W Prideaux Castle /ˈprɪdɪks/ is a multivallate Iron Age hillfort situated atop a 133 m (435 ft) high conical hill near the southern boundary of the parish of Luxulyan, Cornwall, England, United Kingdom. It is also sometimes referred to as Prideaux Warren, Prideaux War-Ring, or Prideaux Hillfort. The site is a scheduled monument[1] and so protected from unauthorised works by the Ancient Monuments and Archaeological Areas Act 1979.