A terrific purveyor of natural history objects and curios.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

These unusual rooms on wheels are holdovers from the 1960s.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

The most historic church in Fairfax County played a role in the creation of the American Red Cross.

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Inside this 150-year-old barn turned antique shop is a vast array of items for curios hunters.

Who knew the Devil's domain was a hot spot for tubing?

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

A much-maligned monument to teetotalism.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

It was once the base for a series of domestic terror attacks.

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

This small-town pizzeria won the Hollywood lottery.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

A few stone foundations and an old graveyard are all that is left of this once thriving settlement in the wilds of Connecticut.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.