Cadw & National Trust places in Monmouthshire

Grassed late Iron Age promontory fort above the Wye in Chepstow's Bulwark suburb, its double bank and ditch traced under the trees, later held by the Romans; free, open daylight hours, on-street parking at the end of Alpha Road.

Venta Silurum, the Romano-British tribal capital of the Silures, with 17-foot town walls, the excavated forum and basilica, a temple and houses spread through the village; free, 10am to 4pm, free West Gate car park with toilets.

One of the first Norman castles in Wales, begun 1067 on a cliff above the Wye, with the Great Tower, Marten's Tower, three baileys and wall walks; council pay and display car park at Castle Dell below the entrance.

Roger Bigod's town wall of 1272 to 1278, up to 13 feet high with semicircular towers and the Town Gate at the top of the High Street, followed from the castle to the Wye; free at any time, council pay and display car park by the wall.

Norman border castle of the Three Castles of Gwent above the Monnow, with red sandstone towers, a 14th-century chimney and a footbridge over the moat; free, open daily, a five-minute walk from Grosmont village street with no car park.

Square water-filled moat of a vanished manor of the bishops of Llandaff, later a hunting lodge, with a timber footbridge onto the grass platform, in a field on the lane to White Castle; free, open daylight hours, no designated parking.

Augustinian priory ruins of about 1118 in the Vale of Ewyas below the Black Mountains, with a superb nave arcade and crossing tower beside a hotel in the west range; free, open daily, car park for 30 cars.

Fragments of the Great Tower and hall where Henry V was born in 1386, beside Great Castle House and the free Regimental Museum in Monmouth's town centre; free, open daylight hours, council pay and display parking in Glendower Street.

Cadw's grandest Welsh-built castle: the moated Great Tower of 1435, the Earl of Pembroke's machicolated gatehouse, two courts and the remains of Renaissance garden terraces, with a free on-site car park.

The roofless Gothic church of the first Cistercian abbey in Wales, founded 1131 beside the River Wye, with cloister and monastic buildings; pay and display car park at the visitor centre refunded on a £5 spend.

The most imposing of Monmouthshire's Three Castles, with a twin-towered gatehouse and water-filled moat remodelled for the future Edward I; free, open daily, four-car parking at the gate down single-track lanes.

A 13th-century castle of the Three Castles of Gwent beside the River Monnow.

Mountains, valleys and the Clytha Castle folly in the Monmouthshire countryside.

A hilltop with an 18th-century Round House and Naval Temple overlooking Monmouth.