A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The only freestanding table rock formation east of the Mississippi.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

The longest navigable underground river in the United States is home to countless blind and albino animals.

At the turn of the century, a chair like rock sat at the top of the falls and hosted the winner of a local beauty contest.

This former mill tunnel was blasted under the ridge to divert a portion of the Muscatatuck River.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.

Kentucky's longest operating jail is now a spooky spot to spend the night.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

This railroad overpass is said to be home to a murderous goat-man whose very legend has led to very real deaths.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

Marine fossils from the Devonian period are exposed at this park.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

Some islands... they come, they go, especially on Lake Travis.

Now abandoned, this East Austin school for the disabled began as the "State Colony for the Feeble-minded."

A collection of 100 brains preserved in jars on the UT campus.

Unusual house, in an unusual neighborhood, home to some very unusual peanuts.