Mocona Falls was suggested to me by the good folks at the tourist info center at Colonia Carlos Pellegrini. I was very glad I went. The boat ride was one of the high points of my trip to Argentina.

So the falls are visible for most of the year, but after much rain the river level can rise so much that the falls effectively disappear and it just becomes a big lake. At its highest the falls can be 12m tall. It was 4m when we visited and still amazing to see, mainly because it is 3km long. It was difficult to find information beforehand about los Saltos so we did go to El Soberbio not knowing if we'd see anything. The tourist office there was helpful and did confirm the park was open. if the water level of the river was too high, the low lying bridge going into the park would be closed. When we visited in May 2018, there was only one bus going to los Saltos leaving at 8am and returning from the park at 5pm. You don't need a full day to visit this place, so having your own transport is far better. Apparently the flow of the water is affected by a dam that opens and closes, so Sunday and Mondays are apparently better days to view the falls. From Argentina side, you can only view the falls via a boat excursion. They charged 400 pesos for the 15 minute ride. Very expensive, albeit great experience. No one speaks English. There are two walking trails nearby where you can see wildlife if you're lucky. I won't go out of my way to visit los Saltos though.