"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

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.

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

The hidden offices underneath Memorial Bridge have been locked up since 1976.

D.C. once had its own tiny rival to the New York Stock Exchange.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

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

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

This Indianapolis landmark offers a secret panoramic view of the city. 

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

This half-ton piece of the Alps sits at the base of the CN Tower.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

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

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

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

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

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

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

The third-oldest baseball stadium in the United States is in a league of its own.

Marigolds, rosemary, Madonna lilies, and the Virgin’s Bower decorate this Massachusetts sacred garden.