Cathedral Quarries (Grid NY308028), a set of disused interlinked quarries for green slate, is above the valley in Atkinson Coppice. The quarry site is now managed by the National Trust and can be entered by the public. It features various chambers and tunnels, including one which is long. The quarry's main attraction, 'The Cathedral', is a high main chamber 40 feet (12 metres) high, lit by two windows with a huge rock pillar supporting the roof. Some of the quarry smaller chambers are closed off for safety or have already collapsed.
