A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

From horses to stainless-steel trucks, this iconic Providence burger wagon is one of the oldest mobile diners in the country.

A church of bones, decorated with 40,000 human skeletons.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A little sculpture with a large wardrobe.

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

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

In a resort town where the real Alice spent her summer holidays, iconic characters create a curious trail.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

An iconic British fixture in an unconventional color.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.