4. Rio de Janeiro (Brazil)
One of world’s best known and most prolific cities simply has to make an appearance in 11 most expensive cities to visit in South America in 2015 list. Numbeo’s index of 53.25 is just slightly larger than that of Brasilia, but Mercer’s report puts Rio on 67th spot in the world by expensiveness. It hasn’t moved much since 2014 when it was positioned in 65th spot.