Walk through the history of American pop culture.

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

The wooded estate of the Forest Service employee responsible for D.C.’s cherry blossom trees.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

A Civil War Museum with some notable medical antiques.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

A priceless collection of the Nation's cryptologic history.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Eighteen miniature death-scene dioramas.

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

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

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

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

The privately owned cemetery that holds room for Washington's finest when they step down from life.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

Fittingly, America's museum of architecture is itself a magnificently designed old building.