This public park was the site of the largest civilian disaster of the Civil War.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

This secluded walking trail is a hidden gem of a Pittsburgh park.

It was once the base for a series of domestic terror attacks.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

An overlooked memorial honoring the local Washington residents who died in World War I.

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

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

The "lovely red Vega" of the legendary record-settling pilot.

This grand gothic brewery has been pumping out suds for over a hundred years.

Home to items never before seen by the public.

"Where the ducks walk on fish."

See massive fossils that are over 200 million years old in northeastern Arizona.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Paranormal activity on the great lakes.

The arboretum whose marshy soil sucked up the dreams of housing developers.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Where commuters walk through remnants of an ancient Greek necropolis.