You can go to Chascomus in an hour for $11 (pesos).
I don't have all the info here, but you must call a number and book your place. Then go at the time you arrange to Roque Saenz Peña and Cerrito and a mini bus pick you up. It's a really comfortable way to go there!!
This was very funny. We went to drink something at a bar near the lagoon and in the table next to us there were 2 guys. They were transmiting a radio program from there!! =)
This is the lagoon! =)
Fondest memory: In Chascomus there are lots of campings where you can go and stay for a while infront of the lagoon and enjoy all the water sports there or fishing or just relax!
I used to go camping there while I was a school. I have really nice memories about it!
If you go, please write to me telling me your experience!