A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Home to items never before seen by the public.

The United States Capitol's former columns still stand.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

These unusual rooms on wheels are holdovers from the 1960s.

A building shaped like the Army Corps of Engineers logo, because why not?

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Right next to departures—how convenient!

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

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

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

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

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

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

A former major munitions plant that has been converted into a sprawling art space.

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

The maritime museum that boasts the largest nautical library in the western hemisphere.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

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

America's first federal monument.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.