This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The span is crooked and made from two older recycled bridges.

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

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

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

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

This unique historical monument features large concrete spheres designed to resemble fallen stars.

The romance of early commercial flight still fills this Art Deco destination.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

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

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

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

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

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

The most accurate timepiece in the world.

The national park was once a plantation estate.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

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

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

Decades before the scandal, this staircase on the river was a literal "water gate."