A beautiful Victorian-era cemetery, complete with a miniature village.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The former home of elite checkers battles of the Capital Pool Checkers Club.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

This apartment building designed by a notable Washington D.C. architect housed the Qing Dynasty's Legation.

This groundbreaking 16th-century map is known as "America's birth certificate."

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

They sort through millions of dollars worth of diplomatic gifts on behalf of the government.

Where you can hail your favorite fictional commanders-in-chief.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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

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

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

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Located inside a former record pressing plant, this recording studio pays homage to the techniques and gear of a bygone age.

A fictional Coupe DeVille built by hand and gifted to the Man in Black himself.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.