A giant silver apple a day keeps the perils of capitalism away.

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.

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

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

An annual extravaganza of Broadway theater memorabilia.

The "Seinfeld" diner.

Visit the monolithic tomb of America's most famous general.

This diesel train serviced the Brooklyn waterfront for more than three decades.

These ancient ruins hide in plain sight next to a dessert shop.

An important example of architectural history slowly decays in the city center.

Legend says this sacred tree was a gift from goddess Athena.

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

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Where commuters walk through remnants of an ancient Greek necropolis.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

Stockholm's deepest subway station is also a stunning ecological wonder.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

A heated statue pays tribute to one of Sweden's great actresses.

A concrete mushroom that divided Stockholm residents for nearly a century.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.