Colonia del Sacramento

Colonia del Sacramento, Uruguay — a UNESCO-listed Portuguese colonial town of cobbled streets and sycamore-lined plazas across the Río de la Plata from Buenos Aires.

The Barrio Histórico's Calle de los Suspiros is the most photographed street, and the old lighthouse gives a rooftop view over the terracotta roofs to Argentina across the river. It's a popular day or overnight trip by fast ferry from Buenos Aires — go for sunset drinks at a plaza-side café once the day-trippers head back.