Colonia in Uruguay
Colonia del Sacramento (formerly the Portuguese Colónia do Sacramento) is a city in southwestern Uruguay, by the Río de la Plata, facing Buenos Aires, Argentina. It is the oldest town in Uruguay and capital of the departamento of Colonia. It had a population of 21,714 according to the 2004 census.
The Barrio Histórico (historic quarter) section of Colonia del Sacramento is designated a World Heritage Site by UNESCO. It is a popular tourist attraction for visitors from Buenos Aires, and there is frequent ferry service across the Río de la Plata between the two cities, with fast ferries completing the journey in just 50 minutes. The historical section of Colonia, which has some cobblestone streets built by the Portuguese in the 17th century, is within walking distance of the ferry terminal.