Art deco landmark on the outskirts of Washington, D.C.

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

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

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

A clone of a cloned tree that was so important it allegedly had its own guards.

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

The most accurate timepiece in the world.

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

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

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

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

Where the U.S. government kept its actual treasure, before Fort Knox.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

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

A nostalgic bibliographic gem.

People escaping slavery may have hidden inside a corpse vault.