Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

This museum houses two of Mexico's most impressive Aztec monoliths.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

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

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

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

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

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

A secret greenspace hides atop a Capitol parking garage.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.