These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

Austin’s local mountain isn’t really a mountain at all.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

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 giant bronze image of Christopher Columbus embarked on a voyage of its own.

This former railroad bridge was named after the great river that once flowed below it.

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

A park where people have been going to feed friendly pigeons since the 18th century

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

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

An unnatural lake in a naturally beautiful setting.

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

La Cara del Indio honors the Taíno chief who fought bravely against the Spanish invasion of Puerto Rico.

Invading U.S. troops were first seen from this now-abandoned tower, leading to the Spanish-American War.

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

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

Years of neglect and nature took a toll on this 19th-century lighthouse.

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

Drift through underground caves on a tube.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

The world's second largest single-dish radio telescope, once used to contact E.T.

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

This former sugarcane transport tunnel is now a portal to a lovely beach.