Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

The easternmost point on the island of Ireland.

A touching tribute to the "Queen of Soul."

One of the deepest springs in Missouri.

This refurbished gas station is one of the oldest in Texas, located on the original Route 66.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

After decades of research and rumors, Little Zion Church was proven to be his final resting place.

A hobby born from insomnia has turned into a hangar full of objects that have been be-buttoned by the Button King.

This natural sea arch highlights Ireland's rugged coastal beauty.

An annual celebration of the region's successful elk reintroduction program.

Drift through underground caves on a tube.

This colorful gate stands as an entrance to the walled city of Old San Juan.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The childhood home of the legendary blues guitarist and singer.

The second-highest train station in Europe.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

A man-made island in scenic San Francisco Bay.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Ruins of an American Civil War iron forge still survive today.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.