Only hotel where you can legally launder money.

Furniture tries to escape an abandoned building in San Francisco.

California's oldest wind harp represents a historic piece of America's Danish history.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

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

A historic arena where the Beatles played their first concert in the U.S.

The most accurate timepiece in the world.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

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

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

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

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

This working class sculpture pounds his hammer all the livelong day.

Every drop of D.C. tap water flows through this old waterworks.

This 700-year-old street food market features baby octopus and soy donuts.

A vast museum devoted to North Korea's victories against its imperialist enemies.

A highly symbolic tower in honor of Supreme Leader Kim Il-sung's personal philosophy.

This grand gothic brewery has been pumping out suds for over a hundred years.

This university transit system is a 1970's vision of the future.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.