This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.

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

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

The famous Beatle secretly visited this Illinois town several times to visit his sister.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

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

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The fountain marks the area where hundreds of accused witches were burned at the stake.

The heads of two giant mythological water horses honor Scotland's horselord past.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

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

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

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Scotland still bears an enormous scar of its Roman past.

Where the sleeping monsters of Scotland's oil industry are left to rust.

A mailbox that saved a nature reserve.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.