Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

The world's only known button museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

All of Chicago's wood-paved streets are long gone but two alleys remain.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

These abandoned grain silos and tunnels are an urban exploration dream.

A lush green oasis in the middle of Chicago.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

World's largest collection of Coke-related items not held by the Coca-Cola company.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

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

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This huge clock made of flowers and simple machinery was once used a political weapon.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

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

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

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.