Former farm staffed by mental patients is now a public park.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

"I did this all while you were watching TV."

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

Breathtaking and huge 430 year old maps of Italy.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The stately remains of Llywelyn the Great's mighty fortress.

A bike being "eaten" by a tree is the real Vashon legend behind popular children's book, "Red Ranger Came Calling."

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

It specializes in outsider art and artifacts of secret societies.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This once luxurious Catskills resort is now a haunting ruin.

A museum dedicated to a sea that should have never been.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

A small medical museum with a recreated doctor's office.

A corkscrew-shaped barn in Ireland.