Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

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

A student driver's nightmare.

Eighty million natural history specimens call this gargantuan museum home.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Banksy gives themself artistic license with this piece of London street art.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

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

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

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

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Atop this former dutch railway office sits an interstellar work of art.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

A miniature city, once ruled by the Queen of the Netherlands.

Colorful and chaotic stacked hotel in North Holland.

A set of seven houses, each built in a style that represents a European country.