The world's longest known cave system.

These otherworldly limestone formations jut out from the Kansas prairie.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

Stories of sightless fish and ghostly cowboys are only a fraction of the legends surrounding this Kansas sinkhole.

Curious rock formations in a tiny Kansas state park.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

Home to Hollywood history and a very special salt crystal.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

The magazine keeps a perfectly groomed display garden for its photo shoots.

This simple home was the beginning of a long journey for the iconic Western film star.

The notorious couple camped at this site after a bloody shootout with police.

An eclectic assortment of medieval architecture in a small Iowa town.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

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