It's 500 pesos to get in. Don't expect much. Both falls are tiny (I've seen artificial falls that are twice as large) and not very scenic. There were many people trying to pose with the falls though. i didnt see what the draw was. There're much nicer falls in the Lake District. If you must go, the same bus that goes to Lago Caburgua makes a stop at the main road. From here, it's 300 meters to the ticket booth.