For an easy day trip from Buenos Aires, take the train up to El Tigre which lies on the Paraná Delta. The best way to enjoy this area is spending an overnight at one of the many beach houses. If that’s not an option, I only recommend visiting El Tigre if you’re spending an extending period of time in Buenos Aires as I think other regions are more interesting to see.
The two main attractions are taking a boat tour through the delta and riding a bike around town.
For the boat tour, I bought a same-day ticket upon arrival. They offered one and two hour boat tours. Thinking the longer tour was a steal, I sprung for it…but got so bored by the lackluster scenery on that I ended up napping 🙂
Biking around town was better than the boat tour. I explored the fruit market and particularly liked the Museo Arte campus.
Again, not an epic day trip by any means; just another interesting day in Argentina!