Sarn Helen refers to several stretches of Roman road in Wales. The 160-mile route, which follows a meandering course through central Wales, connects Aberconwy in the north with Carmarthen in the west.
Tomen y Mur is a Roman fort in Snowdonia, Gwynedd, Wales, dating to the first century AD. The fortification, which lies on the slope of an isolated spur northeast of Llyn Trawsfynydd, was constructed
Reconstructed wall at the northwestern corner of the fort
A lidar view of Tomen y Mur Roman Fort and Norman Motte.