This skyscraper once housed weapons during the revolution and was the scene of two brutal crimes that shocked São Paulo society.

Ella Fitzgerald, opera singer Enrico Caruso, and dancer Isadora Duncan all performed in this lavish, supposedly haunted theater.

This necropolis is home to eclectic funerary art and is the final resting place for much of the city's nobility.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

Known for centuries as the famous Roman emperor's burial place, this monument is actually something else.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This medieval city gate is now a blend of the past and the modern world.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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.