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

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

The last manually operated turntable ferry in the world.

This ruined castle is said to be the legendary keep of a Viking princess.

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

This massive monument has been telling the time for 150 years—at a slight angle.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

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

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

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

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

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

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This 19th-century prison once held Irish revolutionary Constance Markievicz, writer Frank O’Connor, and a nine-year-old pickpocket.

Horse cemetery on the grounds of Blarney Castle.