The La Paz Department of Bolivia comprises 133,985 square kilometres (51,732 sq mi) with a 2001 census population of 2,350,466 inhabitants. It is situated at the western border of Bolivia, sharing Lake Titicaca with Peru. It contains the mighty Cordillera Real that reaches altitudes of 6.6 kilometers (4.1 mi). Northeast of the Cordillera Real are the Yungas, the steep eastern slopes of the Andes that make the transition to the Amazon basin. The capital of the department is the city of La Paz, also the administrative capital of Bolivia.