A miniature world of concrete and stone in Springfield, Ohio.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

The largest earthwork effigy in the world.

The Cadillac Ranch for monster truck aficionados.

Conjoined twins Daisy and Violet Hilton were stars of the vaudeville circuit.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

A lush green oasis in the middle of Chicago.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

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

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.