This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Before Nixon, "watergate" meant canals.

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

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

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

A terrace reminiscent of Rome's Spanish Steps is tucked away in a little park in Washington, D.C.

The most accurate timepiece in the world.

Surrounded by a verdant garden and a backdrop of ivy, a monument to beloved poet Khalil Gibran stands outside of the Lebanese embassy.

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

This monument traces the segregation line that inspired the first rural branch of the NAACP.

Northern Virginia’s iconic Vietnamese shopping center.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

Parking garage where Bob Woodward met Watergate source "Deep Throat."

At 207 feet, one of the world's longest continuous escalators.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

The local community brought back this land to transform it into a nature preserve.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

This 1st-century CE Roman bath sits under a carpark.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bears of Bern have been a city highlight for over 500 years.

Museum dedicated to wax representations of disfiguring diseases.

This striking art museum holds an amazing series of curiosity cabinets.