The Norfolk Broads are a network of mostly navigable rivers and lakes. They were created due to flooding on early peat excavations.
The Romans first exploited the rich peat beds of the area for fuel, and in the Middle Ages the local monasteries began to excavate, selling fuel to Norwich and Great Yarmouth.
The Cathedral took 320,000 tonnes of peat a year.
Then the sea levels began to rise, and the pits began to flood.
Despite the construction of windpumps and dykes, the flooding continued and resulted in the typical Broads landscape of today, with its reed beds, grazing marshes and wet woodland.