This hidden alley near the location of Rome's first theater was the site of a curious miracle.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

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

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

Architectural monsters are devouring this palace's every door and window.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Ancient ruins hidden underneath a modern luxury hotel.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

A memorial to the victims of Argentina's "Dirty War."

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

A mysterious architectural gem in one of the most elegant areas of Buenos Aires.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

The narrowest house in Buenos Aires is less than 10 feet wide.

A tower devoted to — and modeled after — the Divine Comedy.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

What started as three small gnomes at the base of a tree has grown into a full-blown gnome home.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

It's believed Elvis Presley was inspired to write his breakthrough track after staying here.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

A museum preserving one company’s history of preserving food.

A museum founded to reflect on and remember the human rights abuses under Chilean dictator Augusto Pinochet.

The gorgeous murals at this open-air museum form the largest street art collective in Chile.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.