The world's oldest family-run magic shop is hidden beneath a bustling London thoroughfare.

Hidden beneath the streets of London is a secret subway that only carried mail.

Rebuilt remains of a temple to Roman god Mithras.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

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

The stately remains of Llywelyn the Great's mighty fortress.

Singing sand that stands as the final remains of an ancient lake.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

Series of underground houses inhabited continuously for centuries.

A natural arch offers panoramic views of Yangshuo's karst hills.

A fifth-century temple improbably built into the side of a cliff.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

The world's brightest bioluminescent bay.

A harrowing trail up a mile-high mountain.

Shoreline strewn with the remains of ghostly fallen trees.

Stroll through a wonderland of stupendous moss-covered trees.

The most loyal of little dogs, or a Victorian era publicity stunt?

360° views of the city plus five floors of optical illusions and hands-on science.

A museum dedicated to the history and exploration of both popular music and science fiction.

A giant Troll lurks under one of Seattle's oldest bridges.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.