Where the author wrote her beloved "Little House" books.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

This beacon for pre-radar pilots once guided Charles Lindbergh to a safe touchdown in Tulsa.

The modest childhood home where the baseball legend and Yankees star learned to hit from both sides of the plate.

Songwriter Leon Russell transformed this church into a recording studio used by many legendary musicians.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

The granite monument is engraved with the image of the talking horse's head coming through a barn door.

When you can afford only half a road, you build only half a road.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

This former mining town was named the most toxic town in America.

Nature's biggest mammal swims in landlocked Oklahoma.

The largest spring in Northwest Arkansas is also home to a sprawling botanical gardens and a historically significant bluff.

This mill has survived a tumultuous past to still produce flour and cornmeal.

The seventh largest spring in the world.

A short boardwalk through a swamp leads to the spot from which the Louisiana Purchase was surveyed.

The scant remains of an expansive indigenous civilization can be seen at this Arkansas state park.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

Learn all about this iconic air rifle without putting an eye out.

The only museum in the world dedicated to the history of sprint car racing, next to one of the country's most historic dirt tracks.

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

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