Tucked inside the southern city walls, the Dane John Gardens are an unexpected pocket of green in the middle of the old town. The mound at the centre — known locally as "the Dungeon" — is at least Iron Age and was probably a burial mound, later reused as a Norman motte. It was landscaped into a public garden in the 1790s and has been a city park ever since.
Steps lead up the mound to a small monument and the best low-level view of the cathedral. The lime-tree avenue along the wall is a pleasant short cut between the bus station and the High Street, and the bandstand sees occasional summer concerts. Free; always open.