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

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

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

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

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

A place to pay homage to Taíno heritage.

This rock in the middle of a river in Jayuya contains dozens of Pre-Columbian Taíno petroglyphs.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

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

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

This ''hidden'' 19th-century bridge played a simple, yet important role during the Spanish-American War.

This small primate research island is teeming with playing, fighting wild monkeys.

On a clear day, you can see all the way to the Virgin Islands from the top of this observation tower built in the 1960s.

The world's brightest bioluminescent bay.

An acoustic anomaly with a mysterious cause.

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

Where animatronic singing fish go to retire.

This small Arkansas town once had a close encounter with the Beatles, and are determined never to let anyone forget that. Ever.

This Arkansas town is known for its gangster history, its healing waters, and now its brews.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.