Lake Titicaca, the highest navigable lake in the world as well as the craddle of the Inca and Aymara civilizations, is Bolivia's official postcard picture and the main reason for travelers to visit the country. In addition to Lake Titicaca, visitors should not miss the enigmatic Tiwanaku ruins, the colonial cities of Sucre and Potosi, La Paz, the highest capital city in the world, and the Jesuits missions in Santa Cruz.