Durham Cathedral is one of the outstanding buildings of the Norman Romanesque world — its great cylindrical pillars, carved with geometric zigzag and chevron patterns, and its pioneering ribbed vaulting (one of the earliest in Europe) make it architecturally as well as spiritually significant. UNESCO listed it alongside Durham Castle as a World Heritage Site. The best first view is from the railway viaduct to the south, or from the riverbank path below — the cathedral and castle together on their wooded peninsula, seen from the water, is one of the great townscapes of England.
Inside, the Galilee Chapel at the west end is the most atmospheric corner: 12th-century Romanesque, low and intimate, with the simple tomb slab of the Venerable Bede and faded traces of original wall paintings. The cathedral treasury houses St Cuthbert's wooden coffin (c. 698), his pectoral cross, and other extraordinary relics. Climbing the central tower — 325 steps — gives views across the city and the surrounding hills. Visits are free, though a donation is encouraged. Harry Potter fans will recognise the cloisters and Galilee Chapel, both used in the films.