Erosion and time have created a naturally-formed water park.

Giant granite rocks standing end-to-end like a train of circus elephants.

The iconic remains of the original Academic Hall that burned down in 1892.

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

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

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

This abandoned prison castle has become an imposing gallery of graffiti art.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

The ruins of a 19th century shelter run by the Independent Order of Odd Fellows.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

A unique blue and yellow phone booth in America's "Little Sweden."

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

This museum features the original car used on the Beverly Hillbillies sitcom.