This sandwich shop has a century-old elevator behind a sheet of plexiglass.

Where the U.S. government kept its actual treasure, before Fort Knox.

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

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

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

The oldest continuously occupied public building in the United States.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

A winding district gerrymandered into the shape of a mantis.

An unusual sculpture, an interesting history, in a strange place, for a good cause.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

A historic cemetery filled with quirky faux wood art and unique tombstones.

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

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

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

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.