Divers have photographed and plotted 25 mysterious man-made features at the site of a British town swallowed by the sea around 700 years ago.
The flint-built remains were found several hundred metres from the beaches of Cromer, Norfolk.
They are thought to form part of Shipden, a medieval settlement gradually consumed by the advancing North Sea during the 14th century.
Following early-morning starts at Sea Palling, volunteer divers travelled along the coast to explore the seabed off Cromer.
The team, from the Anglian branch of the British Sub-Aqua Club, took advantage of clear skies and unusually still water during the summer.
The conditions exposed the
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