After a free morning in Potosi, take a local bus to the temperate valley city of Sucre, Bolivia's official capital. Sucre was declared a UNESCO World Heritage site in 1991 and has retained much of its colonial heritage in its churches, museums and mansions. Most of the colonial buildings have been whitewashed, hence the city's nickname, the 'White City'. When you arrive, the rest of the afternoon is yours to relax or find your bearings. Tonight, maybe see if your group wants to grab dinner – Sucre is known for mondongo (pork ribs) and saltenas (Bolivian empanadas).