You can take a short ferry (about an hour) from Buenos Aires to Colonia del Sacramento for a fun day trip. Colonia is one of the oldest cities in Uruguay and is a World Heritage Site. A small beach side town, it maintains much of its European flair from its colonial past with cobblestone streets and lots of character. Students in years past have rented motorcycles and golf carts for a fun way to tour the city.
A bus-ride away is Iguazu Falls, located on the border of Brazil and Argentina. It is one of the Seven Natural Wonders of the World. Almost a third larger than Niagara Falls, the Argentinian side access offer trails and a train to visit the entrance to Devil’s Throat, the highest and deepest section of the falls. Some walkways at Iguazu Falls offer 260 degree views of the waterfalls.
Also just a bus-ride away is Mendoza, located in the foothills on the eastern side of the Andes Mountains. Mendoza is a popular stop for adventurers and tourists alike, from education and culture to adventure and sports, Mendoza is their jumping off point. A key agricultural city in Argentina, farming has been important to the city since the 1700s, and much of the culture and history of the city is centered around agriculture. For those interested in a bit more adventure, Mendoza is a starting location for many outdoor activities including: white-water rafting, zip-lining, paragliding and skiing.