The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Home to items never before seen by the public.

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

A computer bug so primitive it was an actual insect.

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.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

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

An overlooked memorial honoring the local Washington residents who died in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

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

The United States Capitol's former columns still stand.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

An ancient cemetery with some historic bodies underfoot.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

The world-record holder for the longest bridge stretching continuously over water.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

A brick-lined alley full of public artwork tucked away in downtown Gulfport.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

Florida’s half-sized replica of the Vietnam Veterans Wall.

This steamer is known as "The ship that built Cleveland."

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.