Which city, known as the city that touches the sky, is the highest capital city in world?

La Paz, officially known as Nuestra Señora de La Paz, also named Chuqi Yapu (Chuquiago) in Aymara, is the seat of government and the de facto national capital of the Plurinational State of Bolivia (the constitutional capital of Bolivia is Sucre). With an estimated 789,541 residents as of 2015, La Paz is the third-most populous city in Bolivia (after Santa Cruz de la Sierra and El Alto).

The city, located in west-central Bolivia 68 km (42 mi) southeast of Lake Titicaca, is set in a canyon created by the Choqueyapu River. It is located in a bowl-like depression surrounded by the high mountains of the Altiplano. Overlooking the city is the towering, triple-peaked Illimani. Its peaks are always snow covered and can be seen from many parts of the city. At an elevation of roughly 3,650 m (11,975 ft) above sea level, La Paz is the highest capital city in the world. Due to its altitude, La Paz has an unusual subtropical highland climate, with rainy summers and dry winters.