This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This grand Spanish-Cuban restaurant has been serving customers for more than a century.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.

It's a pretty creepy lock-up.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The site of a gold-digging conquistador's bloody landing in the Americas.

The bizarre story of the mysterious death and hidden treasure of one of Sanibel Island's early homesteaders.

Electrical pylon in the shape of Disney's beloved mouse.

An enchanting natural wonder in Puerto Rico's Camuy River Park.

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

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.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

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.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The only pub in the world surrounded by an ancient stone circle.