A wonderland of caves in eastern Iowa.

An underground wonderland in Iowa.

A mysteriously dark cemetery monument fuels stories and legends galore.

A museum chronicling pioneer life constructed over Interstate 80.

This museum started by a curious collector is now a place for believers and skeptics alike.

What do a giraffe, an elephant, and reasonably priced steaks have in common? This roadside restaurant filled with exotic taxidermy.

The largest collection of historical roller skates in the world.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

The home for all things Kool-Aid offers everything except a chance to actually enjoy the drink.

America's smallest town is run by its single citizen/mayor/librarian/bartender.

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

An idle pastime becomes a record holder in Boys Town, Nebraska.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

This erect, phallic geological spire wasn't always named so domestically.

An experimental, automotive replica of Stonehenge.

This art gallery and oddities boutique bewitches visitors with a trove of occult trinkets and eccentric antiques, work by an ever-changing roster of underground artists, and classes in tarot and other mystic arts.

Internationally known record store and purveyor of "dusties."

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

These abandoned grain silos and tunnels are an urban exploration dream.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

A monument to the art of slicing people open.

A lush green oasis in the middle of Chicago.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A remarkably opulent mansion with a tragic history.