The amazing Venado Caves, formed 15 – 20 million years ago, were discovered by the aboriginal Guatosos. Throughout the 1 ½ hour tour through formations formed by an underground river, we will see stalactites, stalagmites, and marine fossils along with plenty of bats, spiders, and crickets. As adventurers, we should be prepared to move through very tight spaces, get thoroughly wet, and be covered in mud as we walk and crawl along the underground river and through the waterfall to explore the wonders of this cave.