Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A medieval weapon rumored to have been used by the brilliant poet himself.

A clumsy-looking flying locomotive rusts within sight of a busy rail station.

Some say this medieval church is where the poet Dante married his wife and also met the love of his life.

Reproductions of nine banned oil paintings coyly hidden behind a curtain in a New Mexico conference room.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

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

Why walk on this historical site when you can zoom down instead?

An old train trestle re-imagined as an Egyptian obelisk.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.