The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Perhaps the most scandalous statue of America's first president.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

The world's largest fully steerable radio telescope.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

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

Extraordinary objects lurk in this quintessential regional museum.

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

Where pardoned turkeys once spent their all-too-brief final days.

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

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

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

This pun was simply waiting to come to life, and one defense contractor made it so.

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