Explore a pristine, hidden world when you go underground in the massive Rio Camuy Cave Park. Descend through fern-filled ravines and visit the vast cathedral-like caverns of the world’s third largest cave system. Peer down a dizzying sinkhole and see a mighty tropical river thundering 400 feet below you.
Then leave the underworld and turn your attention to the skies above. Visit the fascinating Ionospheric Arecibo Observatory and see the largest radio telescope on the planet.
Learn about the observatory’s history and importance in space research, and why Areciba in Puerto Rico is the perfect place to put it.
