Brazil :: Angra dos reisBelemBelo horizonteBrasiliaFlorianopolisFortalezaIguacu fallsJoao pessoaManausNatalNiteroiNova FriburgoOlindaOuro pretoPantanalPetropolisPorto alegreRecifeRio de JaneiroSalvadorSao pauloVila velhaBahia blancaBarilocheBuenos AiresCafayateCorrientesEsquelGaimanHumahuacaIguazu fallsJujuyLa plataLa riojaLos alerces national parkMar del plataMendozaPatagoniaRosarioSaltaTierra del fuegoTucuman

You can explore Buenos Aires by foot, bus or horse-drawn carriage (romantic but not very fast). The most effective way is probably by using the subway —the A Line has charming old cars with wood and leather interiors.