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

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

An eatery for UFO seekers on the Extraterrestrial Highway.

This sign designates the road that leads to the infamous Area 51.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

This cemetery is home to numerous granite headstones that are works of art unto themselves.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

The oldest still-operating tavern in the United States was once owned by a pirate.

The oldest farmer's market in America is so ancient it was approved by the King of England.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

A beautiful oddities shop crammed with strange and morbid curiosities.

A toxic ghost town sitting atop a massive coal fire.

The world’s first penitentiary, meant to be humane, drove men insane.

A lively annual event in which thousands of people race to push coffins heavy with bodies up a hill.

This sidewalk tribute honors Colorado's great culinary creation.

The glowing blue Nymphaeum of Emperor Tiberius.

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

A 14-foot monument marks the resting place of two of the town's earliest residents—and one unknown soldier.

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

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.