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

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

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

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.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

This jail which was in service for over a century is now open for curious visitors.

The first home of the doomed aviatrix Amelia Earhart.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The oldest continuously occupied public building in the United States.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This is one really big nut.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

Home to Hollywood history and a very special salt crystal.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.