Get one of your more unique passport stamps by taking a day trip to Colonia del Sacramento, Uruguay, from Buenos Aires. A UNESCO World Heritage Site, Colonia del Sacramento is a charming destination, full of historic buildings along the Rio de la Plata. The ferry ride from Buenos Aires is under 90 minutes, giving you plenty of time to check out the sights! From the incredibly Instagrammable Calle de Los Suspiros to a café you’ll remember for years to come, you’ll love your day trip to Colonia!