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 first ‘Harry Potter’ film.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

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

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

A small museum in the Golden Triangle tells the story of the opium drug trade that gripped Northern Thailand.

A white Buddhist temple with a golden restroom.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

France's most famous cemetery, with some of its most curious tombs.

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

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

An elevator into the Baltic Sea.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A modern sliver of architecture in Roma.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This large, circular tomb is the final resting place of the first emperor of Rome.