These eerie outliers of the lightning bug family glow a mysterious blue color.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

The 15-foot-wide, 2-ton pan fries hundreds of chickens once a year.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

The walls of the iconic dome are hollow and have a secret stairway.

A historic ruin just 20 feet away from a busy highway onramp.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The United States Capitol's former columns still stand.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Some locals believe the fabled lost gold of General Yamashida is hiding somewhere beneath the city.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

These abandoned waterworks are crumbling into the Potomac River.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

Despite its name, this route in southern Utah offers a heavenly day trip.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.