Exeter is an ancient city on the River Exe in southwest England. Dating back to the Roman era, the Exeter City Walls surround its centre and Gothic Exeter Cathedral. Exeter Castle, a Norman landmark, overlooks leafy Northernhay and Rougemont Gardens. To their west, the Royal Albert Memorial Museum & Art Gallery (RAMM) displays fine art and costumes. The vaulted, medieval Underground Passages snake beneath the city.