Río Camuy Cave Park features an extensive network of natural limestone caves carved by the third-largest underground river in the world, with over 10 miles of mapped caverns and 220 caves accessible to the public by reservation. Visitors explore the cave system that was officially discovered in 1958 but shows evidence of use by indigenous inhabitants hundreds of years ago. The park spans three towns in Puerto Rico's northwestern region and offers guided tours through a portion of this vast underground system.
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