Rare recess caves fill this unbelievably beautiful Ohio park.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The Home and murder site of the witch of Rehmeyers Hollow.

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

The charming collection celebrates a small Ohio village's Finnish roots.

A natural gas leak provides a flickering flame beneath a waterfall.

The first and only American institution dedicated to the enduring value of comedy in the United States.

A quirky collection of outsider art made from automobile parts.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

The world's only statue dedicated to the greatest Great Dane in comic strip history.

A collection of unique outdoor sculptures surounded by the beauty of nature.

An abandoned tuberculosis hospital moulders on into an uncertain future.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

The absurd creation is a compulsory destination for selfies in Buffalo.

Museum dedicated to the struggles of the disabled.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

Prehistoric animals decorate this popular outdoor park.

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.