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

Man-made geyser that rises to the exact height of the Gateway Arch.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

Less a museum than a bizarre fantasy world created by artists and engineers.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

Commonly acknowledged as the only public monument to the Devil himself.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The tree is thought to be the oldest oak in Texas and was once crowned state champion for its monumental size.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The unbelievably opulent home built for an infamous newspaperman.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.