Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Looming communist pillar with a Czech twist.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

This antique prison is a tourist attraction with a sordid past.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

The Bristol Camera Obscura housed in an ancient windmill.

"Holy Wisdom" overlooks the city that became its namesake.

Eastern Bloc nostalgia, anybody?

A vast Communist-era exhibition space in the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A striking symbol of the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

Ancient serpentine sacrifice holder that has stood the test of time.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

An underground city of salt.

World's most expensive home.

An extraordinary "City of Caves" carved from solid stone.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This bridge was constructed from the rubble of the infamous Bastille.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.