Pennhurst Asylum has secrets but the entities that haunt its corridors have a story to tell. Go inside its crumbling buildings and haunted underground tunnels to discover who or what lurks there.

Meet Pam and Tyler, the psychic mediums of Ghost Hunts USA. With exclusive access to the Mayflower Building at Pennhurst Asylum, they use their incredible abilities to help the lost and trapped spirits inside.

The team begins their investigation of Pennhurst Asylum. Immediately, the medium picks up on the presence of a dark entity in the basement of the Mayflower Building. But evidence from the Phasmabox reveals there's more than one entity present.

The paranormal activity in the Mayflower Building ramps up as the Ghost Hunts USA team digs deeper to try to make contact with the entities that still roam the corridors of Pennhurst Asylum.

According to Ufologists there are certain places around the world where UFOs congregate. The really big question though is, why would aliens who've traveled half way across the universe be so keen on visiting a small area of Scotland?

Journey deep into the ancient world of Egyptian Pyramids, Stonehenge, Balbek in Lebanon and the giant heads of Easter Island. Was extraterrestrial technology handed down to primitive man thousands of years ago to build these massive structures?

Something is hungry for blood in the jungles of Latin America and many believe it's a blood-sucking alien feasting on animals. Is it the result of a mutated CIA experiment or an alien traveling by inter-dimension portals and feeding on it's prey?

In an age of conspiracy, paranoia surrounds almost all facets of life from government to royalty, to big business and the media. There's one conspiracy that makes all the others seem like child's play; our every day lives are being run by aliens.

Roswell, New Mexico- The most famous place in the world associated with aliens. In 1947, an alien spaceship crashed onto a ranch outside the town, scattering tons of spaceship debris. According to the government, it was a balloon... or was it?

The crew constructs a treetop retreat from salvaged materials in Oahu, HI.

The guys build a spacious farmhouse up in the trees of Texas.

The guys build a masterful treehouse for a master tree climber in Oregon.

The guys build a majestic treehouse in a ring of redwoods in California.

The guys build a romantic treehouse retreat for a sushi chef in Oregon.

The Treehouse Guys respond to a treehouse emergency in Florida.

The Treehouse Guys tackle a treehouse for some special kids.