Bolivia is one of the few countries in the world with two capital cities, but La Paz is most famous for its extreme elevation. Situated in the Andes Mountains, La Paz is the highest administrative capital in the world, sitting at an average elevation of approximately 3,640 meters above sea level. Because the air is so thin at this altitude, the city has a unique climate and visitors often require time to acclimate to prevent altitude sickness. Interestingly, the city's topography is bowl-shaped; the wealthiest neighborhoods are located in the lower, warmer areas, while the poorer districts are located on the higher, colder surrounding hills. While La Paz houses the government and executive branches, Sucre remains the constitutional capital and the seat of the judiciary. To navigate the steep terrain, La Paz features the world's largest urban cable car system, Mi Teleférico, which serves as a primary mode of public transportation.