The system of air guns are fired off remotely to scare any trespassing avians.

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

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

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

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.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

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 tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

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.

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

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

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

America's first federal monument.

The rogue roots are gradually consuming some of the historic marble grave markers.

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

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

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

The narrowest house in America is seven feet of pure spite.