A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

This small fort played a huge role defending Puerto Rico’s capital city.

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

The grave of the first dolphin to play Flipper is located at the Dolphin Research Center.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The largest freshwater lake in the Florida Keys.

The smallest post office in the United States is no bigger than a broom closet.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

Thousands of signed dollar bills turn a simple tavern into a living record of travelers’ comings and goings.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

This isolated airport in the middle of the Everglades sees more alligators than planes.

A failed, un-built suburb that has been going feral for decades.

In memory of the 110 victims of ValuJet Flight 592 that crashed in the Everglades.

When this test site was abandoned, they didn't even bother to take the rocket with them.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

A mysterious castle built as a monument to lost love.

America's only city hall with minarets took architectural cues from Ali Baba and the Forty Thieves.

This distinctive lighthouse with an iron skeleton is one of the tallest on the East Coast.

A tiny twin to Seattle's Fremont troll hides from the Florida sun under the Atlantic Boulevard drawbridge.

Have a ball telling the time at this giant kinetic-energy clock.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

A 220-foot deep watery drop-off, filled with marine life.

The site of the Andover Witch Hunts, which ended with more witch accusations and arrests than Salem.