This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

A resilient tree that has survived for more than 700 years in Guánica Dry Forest.

This museum preserves the heyday of Puerto Rican coffee.

Puerto Rico's once thriving oil company is now an abandoned wonderland of rusty steel.

This "sausage route" features gorgeous views and family-owned restaurants.

This colorful gate stands as an entrance to the walled city of Old San Juan.

These red and black houses were awarded to the firefighters who saved their city from an enormous blaze.

This beach pool offers a spectacle of crashing waves, blue hues, and a historical lighthouse.

This memorial to a family's dead son has survived a century of hurricanes and earthquakes.

Enjoy the waters of this half-moon-shaped natural pool surrounded by breathtaking scenery.

This community-driven organization uses education and eco-friendly technology to protect the environment.

Archaeological sites and great food inside the island's largest mangrove forest.

This 20th-century mansion plays a key role in one of Puerto Rico's greatest novels.

Drift through underground caves on a tube.

The short hike is worth the stunning views and crystal blue waters of a secluded beach.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

Legend has it this historic port was a popular hideout and smuggling spot for pirates.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

Everyone from Alan Ginsberg to The Rolling Stones has stopped by this classic dive bar.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Three bridges straddle a stream, one stacked upon the other.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

A breathtaking flower tunnel bursts with beautiful golden blossoms.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.