Two New York rooftops are home to the largest rooftop soil farms in the world.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

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

Constructed in the 1920s, this former pencil factory is now an office building.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A decommissioned military complex that's now a modern industrial park.

Elevated freight railway turned wildly successful urban park.

The history and future of cannabis.

Christ's blood preserved in a Belgian town.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

Abandoned silver mine strewn with wrecked and twisted structures.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A downtown park built on top of unclaimed graves.

The first declared National Monument in the United States.