Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

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

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

Diego Rivera's massive tiled fountain and failed infrastructure project.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Reminders of the Battle of Berlin still scar the railway.

One of the world's heaviest musical instruments towers within a popular urban park.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

A restaurant and observation deck built in a unique broadcasting antenna.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

An underground magnet for ever-changing street art.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

3/4-scale model of the White House in Atlanta, Georgia.