This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

One man's unrequited love stands in a glass box forever.

This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.

A headstone tells the sad story of a lost little boy and his pet dog.

The largest ancient burial mound in Ohio.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Visitors to this Kentucky homestead turned museum are immediately transported back to the Antebellum south.

Patrick Dougherty's fantastic living tree sculptures, mind-blowing but temporary.

The home used in just a few seconds of film that came to define the setting of a hit sitcom.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

Center filled with hands-on displays served as a tribute to several astronauts with connections to the state.

Symbolic attempt to overcome the issues of life.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

One man's vision and a labor of love of many.

This cave holds a surprisingly colorful variety of geological oddities.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

Amateur taxidermy museum known for its large collection of white squirrels.

If astronomy had a ghost, it would look like this observatory.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

Ornate limestone building now filled with geologic specimens, and more.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

Former hotel turned into haunted playground.