A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

There aren't too many operational funiculars around, but Pittsburgh has two!

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

The final resting place for Bermuda's British military, including a man who died of sunstroke.

The world's smallest drawbridge.

The only sea in the world that has no land boundary.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

It took 82 years and four different plaques to finally get the story right.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

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

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

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

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

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

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Everyone's invited to put on a miniature concert with this world-class musical wonder.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.