This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

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

Breathtaking and huge 430 year old maps of Italy.

Baroque celebration of the end of the Great Plague of Vienna.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

The ruins of an abandoned church loom within a picturesque Ukranian village.

A former military outpost of Ivan the Terrible, the 16th-century church contains some of the rarest examples of Eastern Orthodox mural paintings.

Russia's own leaning tower was built on a tragic historical fable.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

Amsterdam's former hotspot for public executions and dissections.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This no man's land slicing through the island is strewn with abandoned relics of another time.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

Unusual building appears to be haphazardly built from randomly piled bricks.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

The home-turned-museum of Barış Manço, the mustachioed Turkish Elvis for children.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.