This landmark jazz venue is the oldest continuously running African-American club in the United States.

At this farm in upstate New York, the former president plotted his reelection campaign.

This water tower has been a staple of the Rochester skyline since 1931.

The world's last remaining store of its kind.

Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

This nine-story building is the oldest standing skyscraper in D.C.

The house where John Wilkes Booth conspired with his co-conspirators.

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

The walls of the iconic dome are hollow and have a secret stairway.

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

This statue of the "father of television" stands prominently in the United States Capitol.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

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

This taxidermy horse was a Civil War hero.

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

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

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

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

A portal into the bricked up canal that runs through the heart of Washington D.C.

Decades before the scandal, this staircase on the river was a literal "water gate."

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