King's College Chapel in Old Aberdeen, built in 1500, is one of the finest medieval buildings in Scotland. The chapel retains its original choir stalls, rood screen, and misericords — a rarity in Scotland, where the Reformation stripped most interiors of their pre-Reformation fittings. The wooden screen, carved in the early 16th century, survived only because the college maintained its Catholic form of worship longer than most Scottish institutions.
Old Aberdeen itself is worth walking through — a conservation area of largely intact 18th- and 19th-century streets around the original university quarter. St Machar's Cathedral, the University of Aberdeen's Cruickshank Botanic Garden, and Seaton Park are all within easy walking distance. The contrast with the oil-money modernity of the city centre a mile south is stark and pleasing.