Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

Illegal drag racing two stories beneath Chicago’s streets.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A hot dog stand where the heads are just as hot as the dogs.

A 19th-century architectural wonder designed by the "father of the skyscraper."

Buffalo's abandoned concrete grain elevators are getting a second life.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

Austin’s local mountain isn’t really a mountain at all.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

A lavender labyrinth so large it’s visible on Google Earth.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

A dazzling display of lights and crystals.

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

The video game-themed street art first popped up in the French city.

This bridge was constructed from the rubble of the infamous Bastille.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This mountaintop mariner’s church is packed with model ships and nautical art while hosting an annual maritime festivity for the townsfolk below.

The vast, legendary catacombs hold secrets much stranger than stacked bones.