This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

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

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

A grandiose title could not save this mercantile community from obscurity.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

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

Faces carved into the cliffs create an otherworldly walking trail.

These beautiful wineries were at the center of Lake Erie's "grape belt" back when the Midwest dominated American wine production.

Landmark dedicated to the plight of the American Indian in the 21st century.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

A real flying saucer, contracted by the U.S. Air Force.

Rare recess caves fill this unbelievably beautiful Ohio park.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

Take a drunken tour inside the world's largest known geode.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

This wooded grove of beautiful hand-built stone grottos is a hidden gem within a shuttered Franciscan monastery.

This pristinely abandoned filling station on the edge of a graveyard is populated solely by unsettling mannequins.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.