Fittingly, America's museum of architecture is itself a magnificently designed old building.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Home to items never before seen by the public.

Two dozen pinball games hidden away inside a most unlikely location.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

The United States Capitol's former columns still stand.

An astounding collection of medical specimens, including bits of President Lincoln.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Brain collection and database that narrows the gap between man and animal.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

These lush botanical gardens employ the most purrfect pest control force.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Yo, Adrian!

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The romance of early commercial flight still fills this Art Deco destination.

This museum explores the grim reality of life in the earliest British colonies in America.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.