The imposing ruins of Peveril Castle stand high above the pretty village of Castleton in the heart of Derbyshire's Peak District. Mentioned in the Domesday survey, Peveril Castle is one of England's earliest Norman fortresses. The keep was built by Henry II in 1176.

Set in the attractive Moors-edge market town of Pickering; discover how this splendid 13th century castle was used throughout the centuries.

Accessible only via a small boat ferry, this 14th century fortress was built by the Abbot of Furness to guard Barrow-in-Furness against pirates and Scots raiders.

The remains at Piercebridge are part of a large bridge that carried a Roman road across the River Tees.

Pike Hill is one of the few visible elements of the Roman frontier that pre-date Hadrian's Wall.

Not far east of Chesters Roman Fort in Northumberland is a 15 metre-long stretch of Hadrian's Wall at Planetrees.

One of the best-preserved milecastles on Hadrian's Wall, Poltross Burn Milecastle is unusually large: it contained two barrack blocks, one on either side of a central road.

The most impressive and best-preserved of the Roman 'Saxon Shore' forts, Portchester Castle was originally built in the late 3rd century. An exhibition in the keep interprets the history of the castle and Portchester village, and displays finds excavated on site.

The burial chamber at Porth Hellick Down dates from about 2000 BC.

Overlooking Portland Harbour in Dorset stands one of Henry VIII's finest coastal forts, built in the early 1540s to protect against French and Spanish invasion.