A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

The tiny airport in remote Newfoundland that inspired a hit musical is also a modernist architectural gem.

Peek inside restored planes at this off-the-beaten-path collection of aviation archaeology.

The final resting place of the controversial chess champion.

The romantic botanic tunnel feels like a well-kept secret.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

They squeal, they nosh, they look like predators.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

This old wooden funicular railway leads to a cemetery in the forest.

Where the notorious gang lived while on the run from the FBI.

During World War II the Thorp building was guarded by the OSS, FBI, and US Navy because of the top-secret bombsight being produced there.

For nearly a year, General Ulysses S. Grant was based here during the American Civil War.

Search for traces of the dinosaurs that roamed here more than 90 million years ago.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

A portrait of the Charter Oak hangs in a frame made from the Charter Oak.

A prison-like structure guards the remains of a notorious Old West outlaw.

Seven people are buried in the middle of what's now a movie theater parking lot.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

This beacon for pre-radar pilots once guided Charles Lindbergh to a safe touchdown in Tulsa.

See the motorcycles that launched the stuntman to fame and the gear that saved his life.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.