The remains of the great moral philosopher reside in a university in London.

A diminutive statue that was inspired by the sculptor's own daughter.

A Serbian church lit by chandeliers made of weapons.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A pair of connected skyscrapers form this symbolic gateway.

A museum dedicated to the former country.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A striking geological formation in Southern California.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

The amazing wonder cabinets of a very rich Austrian archbishop.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

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

Op-art architecture designed for happiness.

The beautiful baroque library of the Hapsburg empire.