One man's ambition created this psychedelic log home.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

This abandoned amusement park was built on a site with a dark history.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

The remnants of an early American attempt at missile defense.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

A crumbling hospital from the 1850s on Roosevelt Island.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.

This amazingly preserved Gold Rush town is a historian's dream.

This abandoned prison castle has become an imposing gallery of graffiti art.

A Beaux-Arts triumph set to become Ford's innovation campus

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

During the 1990's nearly all of the world's LSD is thought to have come from the operators of the lab once located in this missile silo.

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

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

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Four-story concrete hotel never opened to customers.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.