Built in 1512, the oldest cathedral in the Americas.

After Christopher Columbus died, his son built a fancy house to rule from.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

One of the greatest boxers and humanitarians to ever live chose his hometown as his final resting place.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Home of a 28-foot tall stalagmite known as the War Club.

A historic coal mine that doubles as a museum and tourist attraction.

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

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

A community gathering place that once housed half-ton tanks and the World's Fair.

A wall of chewing gum moonlights as collective art.

Shoreline strewn with the remains of ghostly fallen trees.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A cemetery housing wild west legends in South Dakota.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).