You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

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

An abandoned coal mine reached by a steep hike.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

Monasteries on rock pillars, once accessible only by frayed ropes.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A piece of outsider public art accompanied by a strange urban legend.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

An eerily abandoned stone tower is all that remains of a demolished dam on Cape Fear River.

Ruins of an American Civil War iron forge still survive today.

A historic freight system that found the true gold rush is in tourism.

One of two side-by-side totem pole parks dedicated to educating visitors on Tlingit history and culture.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

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

This landmark cemetery in Boston was created more than 300 years ago.