A haunting tribute to pioneering photographer Clover Adams.

A memorial to a shareholder activist feared by CEOs around the United States.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

There's a crumbling old mansion inside the Smithsonian National Zoo.

The oldest surviving one-room schoolhouse in Montgomery County, Maryland.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

This church is known as "The Home Church of George Washington and George Mason."

One of the only memorials dedicated to journalists who died in combat.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

A Civil War Museum with some notable medical antiques.

This four-story steel sphere in Maryland was used to test biological weapons.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

This unassuming passageway played a key role in one of the most important events in U.S. history.

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

America's Most Wanted's set resides in this tribute to the history of crime and punishment.