This Tennessee manse was built so opulent that the very utilities doomed it to fail.

The secret city built by the Manhattan Project.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Enormous lake at the bottom of a unique cave system.

More than five miles of underground passageways.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Former self-sufficient mental institution now a planned community.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The beauty of urban decay, hiding some dark secrets.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The world's largest set of the ten commandments lay nestled in the heart of the Great Smoky Mountains.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A snapshot of the city's fascinating voodoo culture.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.