Diss is an English market community and electoral ward in the East Anglian area of Norfolk, near the boundary with Suffolk. It had a population of 7,572 in 2011. Diss railway station gets on the Great Eastern Main Line from London to Norwich. The community hinges on the valley of the River Waveney, round a mere covering 6 acres (2.4 ha) as well as up to 18 feet (5.5 m) deep, although there is an additional 51 feet (16 m) of mud. The town takes its name from dic an Anglo-Saxon word meaning either ditch or embankment. Diss has a variety of historic buildings, including a very early 14th-century parish church and an 1850s corn exchange still in operation. Four miles east of Diss is the 100th Bomb Group Memorial Museum at the former RAF Thorpe Abbotts landing field. In March 2006, Diss ended up being the third community in the UK to join Cittaslow, a worldwide organisation advertising the concept of "Slow Towns". Nonetheless, it has since left this campaign.