You should not leave Venezuela without visiting these caves — just make sure to go with a guide who knows the area.
Almost 400 feet long!
One of the most interesting excursions out of Caracas: the caverns of Parque del Indio. You should go on an organized tour, or at least with a local guide who knows the terrain well. Once there you'll enjoy spectacular views over Caracas and Naiguatá Peak, a limestone mountain where some 30 natural caves have formed over the centuries (though only two may be visited). These are the Cuevas del Indio (390 feet long) and the much smaller Pio Cave. Its also a great area for rock climbing, although you need to get a special permit from the National Parks Institute of Venezuela. Paid admission.