The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

A fitting attraction for the corn capital of the world.

The oldest extant wooden jail in South Dakota and possibly the United States. 

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

This towering wooden Sasquatch was carved with a chainsaw.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The first declared National Monument in the United States.

A cemetery housing wild west legends in South Dakota.