Guests become prisoners on a visit to Latvian prison.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Sacred Buddhist home of some spiritual monkeys.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

"X" marks the spot of an echo chamber in the middle of a plaza.

The only surviving sidewalk clock in Brooklyn.

An unfinished rail tunnel that has since been used to house cheese and bats.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

Over fifty whirling pools left by the glacial age.

Why have you never heard of the second most popular tourist site in New York?

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

A little piece of Paris in the sultry south of the U.S.

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

Deep scars on the earth left by the Ice Age.

The final resting place of the Hollywood star who came to a tragic end.

Take a drunken tour inside the world's largest known geode.

World's first "penitentiary," meant to be humane, drove men insane.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The spectacular collection of one of the world's best woodcarvers.

Pennsylvania's own Roswell-style UFO mystery.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

The birthplace of America's favorite fruit-flavored mystery dessert.

An abandoned stretch of highway, deteriorating next to the operational one.