offers trips, including boat rides (recommended) and rides on 4WD trucks through the park (not so interesting - the highlight of the long trip is the same as the short one). To be booked near the entrance or on the circuito inferior before going down to the ferry. If you do one of the boat rides (AR$180 for a short one, AR$380 for a long one which also takes you some way down the river), prepare to get soaked to the skin (you'll receive a dry bag for your camera).