On a hill overlooking Loch Trool, a granite boulder marks the site where Robert the Bruce, King of Scotland, defeated an English army.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

This is the oldest Roman-made bridge in the city still existing in its original state.

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

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

Dedicated to the legendary comedian Eric Morecambe depicting his iconic "Bring Me Sunshine" stance.

Now home to a drinking establishment, this building has a macabre history.

This stone once marked the boundaries of Liverpool's medieval markets.

A kaleidoscopic warehouse-maze of handmade neon signs.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

A massive flood devastated this seaside town, causing many to speculate about whether the government had figured out how to influence the weather.

An allegorical statue of a giant pregnant woman representing justice and truth.

A quirky "castle" formerly belonging to a famous British inventor.

An octagonal folly tower overlooking the sea.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

This secluded walkway overlooks a magnificently wild London green space.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

Preserved baths in a Victorian-era spa town frequented by the most famous people of its day.

The video game-themed street art first popped up in the French city.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

Long tunnels run under the ancient chariot racing circuit to the tower.