The only castle in North America to ever house European sovereigns.

A mysterious pillar in an ancient burial chamber is said to predict how long you have to live.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

The stoutest tree in the world.

This beautifully deceptive waterfall is something far different from what it appears to be.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

The only recreation of William Shakespeare's indoor playhouse.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

A mysterious light of unknown origin on the backroads of Missouri.

This historic cliffside mansion uses a natural cave for air conditioning.

European castle ruins in an American state park are actually the product of death and grief.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Largest lake in Great Britain measured by surface area.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.