This rock formation above the Wabash River is part of an ancient coral reef.

Low-frequency noise compared to an idling train can only be heard by some of this industrial town's residents.

An unknown number of cholera victims are buried in two nondescript graves.

This turn of the century jail once held Charles Manson.

Where hikers on the Tecumseh Trail can exchange a dirty sock for a free geode.

The first spinning jail built in the United States is the only one that still turns.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

An oddity shop filled with taxidermy, funerary memorabilia, and more.

No passport is required to eat around the world at this elegant restaurant.

Proceeds from this colorful teahouse in a historic Atlanta neighborhood directly fund women’s education in northeast India.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

This folk art compound was built by a fortune teller on the advice of three people from the future.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

Mai Tais and Navy Grog served up in one of the original tiki bars.

Ruins of a Carnegie family mansion on Cumberland Island.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A museum dedicated to the legend of Bigfoot in the Appalachian Mountains.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Two gems of Beaux Arts architecture that have been sitting vacant for years.

This general store is more than a century old and home to various oddities and antiques.

This abandoned train tunnel has been the subject of countless ghost stories for years.

A historic coal mine that doubles as a museum and tourist attraction.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.