A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

A network of concealed passageways lies within a busy London Underground station.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

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

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The curios of pharmacist and collector Henry Wellcome.

Repository for more than 22 million pickled specimens.

The monster at the center of the Darwin Center Spirit Collection.

Eighty million natural history specimens call this gargantuan museum home.

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

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

England's most famous front door has an accidental doppelganger.

An architectural oddity hides in plain sight on this iconic London bridge.

This early version of the guillotine was used to execute the man responsible for its construction.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A scattered trail of street art adds a pop of color to the city's stark structures.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The castle still holds traces of the abandoned Roman fort it was built atop.