Strange red rock formations that have been attributed to a higher power for hundreds of years.

This grave marks the final resting place of pioneer John Chapman, better known as Johnny Appleseed.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

A famed artist's inspiring work of peace and tolerance.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

Legend says this sacred tree was a gift from goddess Athena.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

One woman's dream became a train hotel in her backyard.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Annual technopop celebration of peace and love.

Baroque celebration of the end of the Great Plague of Vienna.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.