An eight-sided home built during a brief octagon craze in the 1850s.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

This simple, broken column marks the final resting place of one of America's most famous explorers.

The site of the one of the most deadly train wrecks in American history.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

Visit this playground of waterfalls, caves and sinkholes.

A miniature city built by a single hunchbacked monk.

According to local lore, this narrow passageway through two large rocks was accidentally created by the devil himself.

Cherokee alphabet, proof of ancient North American Jews, or just a hoax?

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

An unfinished rail tunnel that has since been used to house cheese and bats.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.