Remarkably realistic Florida shoal bass "swim" inside this large globoid sculpture.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

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

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The site of the climactic scene from the classic horror film is now a historic landmark.

The United States Capitol's former columns still stand.