An unassuming secret door once led to a legendary watering hole.

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

Portland had a unique approach to Cold War-era protections.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

The hellish conditions of this abandoned mine that snakes beneath the Pacific Ocean gave it its diabolic name.

A building so large that it has its own weather.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

Jacksonville's highways rendered this century-old grammar school unusable.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

Location of a reliquary containing bone fragments of 18 saints.

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

It's a pretty creepy lock-up.

A lion given to the prime minister somehow got stuffed and sent to Florida.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

Remarkably realistic Florida shoal bass "swim" inside this large globoid sculpture.

A private Las Vegas horse ranch adorned with whimsical artwork.

A brothel nestled amongst ghost towns, with an abandoned plane wreck to greet you.

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

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

A vast array of tropical plants collected by a vacationing couple.