A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

The contents of this safe survived a 37-kiloton nuclear bomb.

The remote graves mark the mysterious deaths of four 19th century explorers.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A tribute to the little-known group of women who were the first ever to fly aircraft in the U.S. military.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

This quirky piece of naval artillery has been deafening Canadians for over a century.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The ancestral home of beloved English poet Lord Byron has a bizarre history.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

Abraham Lincoln's vice president took his last breath here on July 4, 1891.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

A World War II-era submarine is stuck in the mud in New Jersey.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

The wreckage of an old coastal trading vessel is only visible at low tide.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

This jail once controlled by the Japanese military now sits abandoned on a remote Pacific island.

The world's first military tank was designed in this English city amid the stalemate of WWI trench warfare.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Local lore holds that Butch Cassidy took an escape route through Red Canyon's sandstone hoodoos after an attempted murder.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.