This stack of stones honors a murdered 18th-century woman.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

A lush indoor jungle fills this bustling Madrid transportation hub.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

A grave marker depicting a body snatching tableau on a 19th-century tombstone.

Legend says this rock was once a chopping block for public executions.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

This king penguin is a knighted brigadier of the Norwegian Army.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A mysterious carving from 17th-century London seemingly depicts a young boy sitting on a bread basket.

A measuring mishap led to these artificial stone ladies losing their stomachs.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

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

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

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

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

Pop culture has helped to keep this iconic British building from being destroyed.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.