The summer home of the largest colony of bats in the world.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

A taste of Middle Earth, in the middle of the Bayou City.

The location of Puerto Rico's first water bottling plant, thanks to a collaboration between Mother Nature and technology.

A unique museum where guests can rent and operate a locomotive.

This decaying complex from the early 1900s was once the site of massive iron and fluorite mines.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

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

An artist’s underground sanctuary, 40 years in the making.

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

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

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

A natural swimming pool in the middle of the Carite Forest.

This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

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

Drift through underground caves on a tube.

An unnatural lake in a naturally beautiful setting.

This nearly abandoned "company town" is a ghost of Puerto Rico's once-lucrative sugar industry.

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

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.

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

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."