The Roman fort at Cardiff was probably established in the first century AD on a strategic site that afforded easy access to the sea. Cardiff Castle occupies the same site; and parts of the the old Roman wall can be seen today incorporated in the structure.

Caerphilly Castle is one of the great medieval castles of western Europe. Its immense size (1.2h) makes it the largest in Britain, after Windsor castle. It is the first truly concentric castle in Britain.

This spectacular Welsh castle was built by the Norman earl, Gilbert de Clare.

Margam Castle, a Tudor- Gothic mansion was - with its service buildings and courtyards - built between 1830 and 1840.

Dolwyddelan is traditionally the birthplace of Llywelyn ap Iorwerth, though the actual site was perhaps on the rocky knoll in the valley below.

Castell Coch (above Tongwynlais)

Chepstow Castle stands on a cliff above the river Wye close to where it joins the river Severn.

Cyfarthfa Castle is the former home of the Crawshay family, historical ironmasters of Cyfarthfa Ironworks in Merthyr Tydfil.

Dolbadarn Castle rests on a rocky hillock at the tip of Llyn Padarn, perched above a roadway near Llanberis, in Gwynedd, north Wales.

The castle's location, on a ridge, surrounded on three sides by the tidal River Cleddau, makes it a formidable stronghold