An abandoned stretch of highway, deteriorating next to the operational one.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

Home to the abandoned Tioronda Hat Works Factory, this park is a combination of woodlands and marshlands.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

Secret Swing.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

10,500 square feet of pinball housed in former dollar store and home to the last playable "Thunderball."

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

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

Abandoned former poorhouse, bible college, and haunted house in an Ohio hamlet.

Constructed in 1882, this jail once housed local inmates and the sheriff's family all under one roof.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

A dictator's failed public works project has been reborn as two linked trails through spectacular scenery.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

The aggressively banal name of this underground fortress of bureaucracy does little to evoke its truly surreal existence.