While honeymooning in Puerto Rico, my husband and I decided to take the road less traveled and forego the all-inclusive resort. Instead, we explored the entire island. Every day was a new adventure, including our trip to the caves. Although this is a highly rated adventure, you'll feel like you're the first person to explore the natural beauty. Unlike touristy attractions in the continental states, La Cueva del Indio is a no-frills, cash-only establishment that will blow your mind. A hand-painted sign welcomes you to the caves, and Tito, the owner-in-residence, is your guide.