Picardy is located in the northern part of France. Picardy stretches from the long sand beaches of the Somme estuary in the west to the vast forests and pastures of the Thiérache in the east and down to the chateaux of Chantilly or Pierrefonds near the Paris Area and vineyards of the border with Champagne (Champagne picarde) to the south. Amiens is the prefecture.