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

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

The most decorated dog of World War I is preserved in the Smithsonian.

An overlooked memorial honoring the local Washington residents who died in World War I.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Washington's iconic carousel has a nice piece of Civil Rights history.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Home to a vast and influential collection of Shakespeareana.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Perhaps the most scandalous statue of America's first president.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A promising candidate for the lost rock laid by George Washington was unearthed, but the hunt is still on.

The tunnel under the Capitol Building where Congress takes out its trash.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

During Prohibition, the U.S. Congress had an "official" bootlegger, with his own Capitol Hill office.