Get a privileged view over Mexico City's Historic Center from a terrace right in its heart.

A museum in the former home of Marxist revolutionary Leon Trotsky.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

This coffee shop lies hidden beneath a historic church.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

Rebuilt remains of a temple to Roman god Mithras.

New York City's smallest piece of private property.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

Roman-era ships unearthed...

Gods clash with machines in a power plant regenerated as a museum.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

An Irish cemetery filled with victims of political strife and violent conflict, including the grave of Bobby Sands.

The world's tallest carillon is located at the top of this skyscraper in Mexico City.

This covert museum showcases booties worn by a rescue dog and slippers owned by Queen Elizabeth II.

The unique collection of gifts includes braids of human hair, a spoon, and a Virgin made of bread.

This one-window stand has been home to a giant vat of slowly simmering meats and an array of unique tacos for almost 50 years.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.