Franconian Switzerland is the northern part of the Franconian Jura. It is often loosely defined as the region bounded by the rivers Main to the north, Regnitz to the west and Pegnitz to the east or by the motorways of the A 70 to the north, A 9 to the east and A 73 to the west. However, the actual region of Franconian Switzerland is only the catchment area of the River Wiesent.