A Victorian park cemetery, standing on the site of what was once the Great North Wood.

Abstract dinosaur models in London.

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

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The remains of Crystal Palace Great Exhibition of 1851.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Budapest's Communist-era statues, banished to the suburbs.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The once highest point in China blends symbolic design with a kick of adrenaline.

Enormous burial mounds of ancient emperors.

Hidden behind musical flora and forgotten for over a thousand years, this cave is now a neon dream.

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

The most famous location in China was home to whole dynasties worth of imperial rulers.

A battle between nature and architecture in the Cambodian jungle.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

An ancient iron pillar in Delhi that seems to be rustproof.