A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

This freshwater spring fills with 10,000 gallons of water per minute.

Obscure Freemasons still live in D.C.’s largest private residence.

An ornate Detroit church, left empty and ravaged by time.

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

Little did a museum know, they possessed the last-known lunch wagon in existence.

Located in a Civil War era building, this café is engrained with the spirit of Edgar Allen Poe.

This little barrel-shaped cottage by Lake Superior was once a cartoonist's summer retreat.

Housed in the university planetarium, the thousand-strong collection of tiny towelettes includes a used one from the hosts of Car Talk.

Large one-man sculpture park in Michigan.

One man’s vision of living among dinosaurs credits Jesus Christ as the engine of biological evolution.