To the south of the A27 and on the western edge of Patcham is Ladies Mile Down (). The area is a remarkable survival of plateau chalk grassland on Downland where almost all such flattish sites have been destroyed by modern farming and has been designated as Local nature reserve. The ancient turf has preserved lots of odd linear banks which are surviving fragments of an Iron Age and Romano-British lynchetted field system.
Ladies Mile Down is situated south of the A27 and on the western side of Patcham. This area maintains a remarkable instance of plateau chalk grassland on Downland, where most similar flat areas have been altered by modern agricultural methods and has been recognized as a Local nature reserve. The ancient turf here preserves numerous odd linear banks that are remnants of an Iron Age and Romano-British lynchetted field system.