George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

World's first "penitentiary," meant to be humane, drove men insane.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Home to items never before seen by the public.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The house where John Wilkes Booth conspired with his co-conspirators.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.