As in many other cities, Buenos Aires has a very broad transport system. Public transport includes buses called colectivos, an underground metro system called subte, some trains, and taxis painted in black and yellow.
These are some things you need to know to move around Buenos Aires easily:
1. Except for taxis, on colectivos (buses), subtes (underground metro) and local trains you will need a SUBE card. This is sold at subte stations and in many kiosks in the city. Also, you can get the SUBE card at the Tourist Information Offices. Once you have it, you will need to pre charge it. Need more info?
2. Buenos Aires map. Buenos Aires is a large city and to have a map in print might be a good option. Yet, you can also use an interactive map to get from where you are to where you want to go. The other option is that you download the App "BA Cómo llego" (how do I get to) from your Google Play Store.
As you have seen, there are many alternatives as regards traveling Buenos Aires. In my opinion, the subte is the fastest way to get around, especially if you are heading downtown. Colectivos are colorful and run through avenues and main streets. Taxis are the most expensive option although you get to the exact place. And about trains, this option is limited; yet, it is a good option to go, for example, to Tigre.