Learn about the last river many crossed to find freedom from slavery in the United States.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

Advice-columnist's bell tower, paid for with pennies.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

This half-finished "city of toys" was almost Italy's own Las Vegas.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Once a safe haven for locals engaged in blood feuds, this 400-year-old fortified tower is now a museum showing what life was like for those lying in wait within its walls.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

New York's oldest magic store.

What is it about mushrooms that makes people wish they lived inside of them?

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

A picture-perfect town, perfect for blowing up.

This strange, small castle on the bayou has withstood the test of time and weather.

An abandoned castle owned and ignored by Masons carries a cursed history.

Hidden in the hills of Western Pennsylvania lies one of the best-kept ghost towns in America that you can legally visit.