A jumble of concrete on the corner of one of London’s terraced buildings is actually a work of art.

A recreation of a sign that Charles Dickens used to see on his walk home.

The scorched Lisbon church that survived two earthquakes and a massive fire.

Tucked away behind the mansions of Mayfair, this picturesque garden is a hidden London treasure with a spooky past.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

England's most notorious suicide spot.

This 16th-century pole was once used in brutal public executions.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

A small collection of objects of a bygone era hide in plain view.

At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

An archway adorned with vulnerable flora and fauna.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

This unusual sculpture is sometimes partially, sometimes fully, submerged.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

Dedicated to one of the author's most iconic works.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

An obscure walkway dedicated to a scientist who helped pave the way for the world to sit up and take notice of Manchester.