The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

The atmospheric road was never meant to be so creepy.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A pagan tradition of draping trees with rags eerily lives on.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

A 18th century graveyard and its astonishing cortege of macabre iconography.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The sign at the garden gate reads: "These Plants Can Kill."

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

Three buildings constructed of over 25,000 multicolored glass bottles.

Rusty red sands line the shores of this Canadian Province.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

One of the largest underground systems runs under Canada's largest urban center.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A surreal statue honoring Prague's favorite literary son.

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