Chepstow Castle.

“It is situated on a narrow ridge between the limestone river cliff and a valley, known locally as the Dell, on its landward side. Its full extent is best appreciated from the opposite bank of the River Wye. The castle has four baileys, added in turn through its history. Despite this, it is not a defensively strong castle, having neither a strong keep nor a concentric layout. The multiple baileys instead show its construction history, which is generally considered in four major phases. The first serious architectural study of Chepstow began in 1904 and the canonical description was long considered to be by Perks in 1955. Recent studies have revised the details of these phases, but still maintain the same broad structure.”