Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

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

A brother statue swap has adorned this building's facade for centuries.

These spartan apartments are provided to clergymen visiting Vatican City.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A mysterious Castle is now home to a rare breed of goat.

This emblematic representation is said to bring the students good fortune.

The 18th-century inspiration behind Harry Potter's Sorting Hat.

Believed to be an execution site used by King Arthur after he was embarrassed.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A herd of half-sized cow sculptures has stood in this part for nearly 50 years.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This 135-year-old weather station studied the effects of the climate on human health.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

Several bricks indicate the various flood levels this crossing has survived over the centuries.

A succinct inscription commemorates the ebb and flow of a woman's life.

These ancient rock graves were featured on the cover of a Black Sabbath compilation album.

Inscribed on the gate are the names of 29 figures from the University's first five centuries.

The oldest church in Inverness witnessed the brutal executions of many Scottish soldiers.