Obwalden or Obwald is one of the 26 cantons forming the Swiss Confederation. It is composed of seven municipalities and the seat of the government and parliament is in Sarnen. It is traditionally considered a "half-canton", the other half being Nidwalden. Obwalden lies in Central Switzerland and contains the geographical centre of Switzerland. It is bordered by the canton of Lucerne to the north, the canton of Nidwalden and Uri to the east and the canton of Bern to the south.