Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

An underground city of salt.

Real bones which are said to have belonged to a Polish dragon.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

The little-known second castle that William the Conqueror built in York.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Go inside the house that inspired L. M. Montgomery to create one of literature's most beloved heroines.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This spooky statue sits outside a famous Prague theater.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This doorless 20th-century elevator doesn't stop or slow down.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Macabre astrological automaton clock dating to the late 1400s.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A Hungarian pharmacy museum with a box full of mummy powder.

Once the home of a hermetic monk, this cave now houses a small church.

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

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.