East Anglia retains an air of remoteness that belongs to its history. With the North Sea on its northern and eastern flanks, it was at one time almost cut off by fenland to the west (now drained) and forests (cleared long ago) to the south. In medieval times it was one of the richest wool regions and, in some parts, was depopulated to make way for sheep. It is now the centre of some of the most mechanized farming in England.