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

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

A unique art installation located on what was once considered the widest railway bridge in the world.

Glasgow's oldest pub has a proud literary tradition and possibly a ghost or two.

A serene public space nestled within the remains of Glasgow’s Victorian maternity hospital

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

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.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

This abandoned limestone quarry now provides visitors with multiple, breathtaking viewpoints.

This former small-town cinema palace was built with the remains of a luxury liner.

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

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

Once the overnight home of Mary Queen of Scots.

Stone monkeys adorn the buildings of this former estate.

A magnificent tomb that was the final resting place of the Dukes of Hamilton.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The Great Fire of London and the regulation of one-way streets both started in this alley.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.