Archaeologists have created a detailed map of the medieval port city of Dunwich, dubbed "Britain's Atlantis" because it sank into the sea centuries ago. Using both high-tech imaging and historic research, archaeologists have been able to map out the town boundaries, streets, and even identify individual buildings.
The research has already lead to discoveries about the town. They now know that at its height the town was as big as medieval London, and that the city had an earthwork defensive wall.
The city's demise began in 1286 when a severe storm washed part of the town into the sea. Later weather events silted up the harbor and further eroded the coastline. The town ceased to exist in the 15th century.