The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Pompeii's less famous neighbor is still revealing her secrets.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

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

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

When it comes to handsignals (and colonialism) rock always beats scissors.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Perhaps the most scandalous statue of America's first president.

Washington's iconic carousel has a nice piece of Civil Rights history.

There’s a hidden military meme engraved on the World War II Memorial.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Decades before the scandal, this staircase on the river was a literal "water gate."

The most accurate timepiece in the world.

Largest Roman Catholic church in North America.