Through the decades, Black music stars have performed at this historic hub for music and the arts.

A celebrity from the late Cretaceous period.

The United States Capitol's former columns still stand.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Art deco landmark on the outskirts of Washington, D.C.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Largest Roman Catholic church in North America.

FDR's Art Deco hospital tower was hopelessly inefficient.

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

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

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

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

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

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.

The world's oldest continuously operating airport was founded by the Wright Brothers.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A priceless collection of the Nation's cryptologic history.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Walk through the history of American pop culture.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.