The site of one of the deadliest skirmishes during the Battle of Fredricksburg.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This mass grave for victims of a massive hurricane remained hidden until 1991.

This spooky road cut through a mound of ancient coral might be haunted by a witch.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

A cult archaeology conspiracy theory claims these West Virginia petroglyphs were written by Irish monks in Ogham.

A memorial in coal country commemorates the victims of an all-too-preventable mining disaster.

A lighthouse on this West Virginia lake started as a joke, then the forces of nature helped make it a reality.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

In 1952, a strange encounter in the woods of West Virginia led to the legend of a 10-foot-tall monster with glowing eyes and a distinctive style.

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

A mountaintop space observatory that is certified dark.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

This abandoned mine and power plant was built atop land once given to Revolutionary War soldiers.

A table rock formation that has been intriguing West Virginians for years.

A melancholy guardian doubles as a judicious godmother to this small town cemetery.

Rare recess caves fill this unbelievably beautiful Ohio park.

Visit a replica of the estate where Aaron Burr allegedly plotted a treasonous scheme against the United States.

The site of the worst mining disaster in Ohio's history.

An abandoned asylum incorporated into a college campus.

A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.

One tiny triangular park commemorates the victims of a yellow fever epidemic—many of whom are buried right below the grass.

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