You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

This poor little statue is the most vandalized memorial in Washington.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

The most accurate timepiece in the world.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

There’s a special club house at the top for the bell ringers.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A celebrity from the late Cretaceous period.

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

A historic ruin just 20 feet away from a busy highway onramp.

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

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

Before Nixon, "watergate" meant canals.

The site of the climactic scene from the classic horror film is now a historic landmark.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

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

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

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

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

Washington's iconic carousel has a nice piece of Civil Rights history.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

An obscure federal monument honors the French diplomat who served as Ambassador to the U.S. during WWI.