Masons’ marks and devotional pecking, 19th-century names and sailors in Scapa Flow – come on a 50-minute guided tour of the ground floor and parts of upper levels not normally seen on tours, and see for yourself. Tours at 10 am, 11 am, 2 pm, 3 pm. Age 12 and over. Tickets £6. Numbers limited, booking essential: phone Cathedral on 01856 874894, or email email@example.com, or call in person.