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Nestled in the forests south of Arecibo is the Rio Camuy Cave Park. This is one of the largest cave systems in the world. Bring your lunch with you as there is a wait, but it is well worth it. Wear shoes with grip because the cave is damp and slippery. Watch out for guano
downtown Arecibo
See the historic Roman Catholic church, Spanish-style recreational plaza, and the municipal buildings surrounded by streets and shops.
You can drive around the pueblo or park your car and walk around the square and into the plaza. The Spanish law, which regulated life in Puerto Rico in the early 19th century, stated the plaza's purpose was for celebrations and festivities.
Parts of the state forest are open to visitors for hiking, mountain biking, camping and bird-watching.