Águas de São Pedro
Águas de São Pedro () is a Brazilian municipality in the state of São Paulo located from the state capital. At only , it is the second-smallest Brazilian municipality in terms of area, and had a population of 2,707 in 2010. Águas de São Pedro means "Waters of Saint Peter". Its name is derived from the mineral springs in its territory and their location, which before the city's founding were part of the municipality of São Pedro (Saint Peter).
Santa Rosa do Purus
Santa Rosa do Purus is the smallest city in Acre. It is located in the center of the state with the border of the Republic of Peru just across the river. Its population is 3 948 and its area is 5,981 km². Santa Rosa do Purus is one of the remotest communities in Brazil. 82% of the population is living in rural districts. The town of Santa Rosa lies on the banks of the Purus River. The only way to reach this town is by a two-three-day journey upriver by boat or by light aircraft. The only street is lined on either side with boxy, Monopoly-like wooden houses with corrugated metal roofs.