Caerphilly County Borough straddles the boundary of the historic counties of Glamorgan and Monmouthshire in South Wales. The 46 scheduled monuments include burial cairns from the Bronze Age, an Iron Age hillfort, and Roman camps. The medieval sites include two castles and a further four mottes as well as dwellings, crosses and churches. Finally the post-medieval sites include the blast furnaces and ironworks of the industrial period.(Main article: Lists of scheduled monuments in Wales)