Cannon on the roof of Seaford’s historic Martello Tower No. 74, overlooking the English Channel.

View across the rooftop cannon of Martello Tower No. 74 in Seaford, East Sussex, looking out towards the English Channel. Constructed in the early 19th century as part of Britain’s coastal defences against a possible Napoleonic invasion, the tower was later used as a machine-gun position during the Second World War. Today, this historic fortification houses Seaford Museum, which explores the town’s local and military history.