The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

Two small markers remember the Alamo's feline protectors.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

Where school buses go to die and be reborn as whimsical works of art.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

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

Carved faces add a touch of magic to this island's impressive oak trees.

A rainbow-colored house promotes LGBTQ rights across the street from the Westboro Baptist Church.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This recently restored timepiece has stood all around Kansas City.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

After nearly 60 years, there's still a bear at Paddington Station looking for help.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

The walls of the iconic dome are hollow and have a secret stairway.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

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

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

Trinkets and toys lovingly handmade by maximum security prisoners.