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

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

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

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

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

An astounding collection of medical specimens, including bits of President Lincoln.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

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

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

A super-sized promotional trick that is now a D.C. landmark.

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.

Right next to departures—how convenient!

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

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

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

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

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

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

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