If hidden waterfalls, kayaking, hiking, bird-watching or beautiful beaches interest you, Ecobiosfera will organize your excursion. The owner, Felix, is a biologist and knows the area very well. Tours run to the deep-green Poza Reina , a swimming hole laden with cascades. The cabañas at the base camp have shared bathrooms and are charming in a Robinson Crusoe kind of way. An overnight stay with full board and two days' worth of tours costs M$1250 per person.