This ancient Roman bridge was a key feature of the ancient Via Salaria road.

The disputed geographic center, or "navel," of Italy.

One of the four sanctuaries of Rieti's Holy Valley was the site of the first living nativity scene.

Romans built the world's tallest artificial waterfall in 271 BC.

This medieval mountain town is also known as the "Village of Streams."

What appears to be an ancient Roman temple is actually a Catholic church.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

A 125-meter long "tribute to the Brazilian people."

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

Hitch a boat ride to dine on stilts while watching wildlife.

An early 20th-century bullring converted into a modern shopping center.

Held in a fort that once stood for colonization of the area, this museum now tells the history of its indigenous people.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

A Christian monastery stands on what was once a holy Incan temple.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This singular art museum in São Paulo is unique inside and out.

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

Washington's iconic carousel has a nice piece of Civil Rights history.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Perhaps the most scandalous statue of America's first president.