During its 7 decades of operation as a sanitarium and convalescent home, thousands perished in this once stately manor. Some locals affix rosary beads and crucifixes to the fence surrounding the property to keep the evil spirits inside.

This mansion, owned by a wealthy abolitionist, was once a stop on the underground railroad. A gateway to freedom for hundreds of slaves, it was also the last stop for many who arrived in terrible physical condition and died there.

Execution Rocks Lighthouse inhabits a deserted island in the middle of Long Island Sound. Etched into a landscape of rocks and isolated by water, the lighthouse's history is full of dark stories of shipwrecks, torture and a serial killer.

During its existence as an operating hospital in East Los Angeles, Linda Vista was deluged with dying gang members and innocent bystanders killed in the midst of a gangland war zone.

Zak, Nick and Aaron return to Virginia City, NV, the site of their very first investigation. The angry spirits in this old western mining town have been waiting for their return.

The abandoned Remington Arms factory in Bridgeport, CT, has a dark history. Once the largest supplier of munitions in the world, mysterious explosions, electrocutions and melted bodies have earned it a deadly reputation.

In its 96-year history, more than 150,000 criminals were confined to the towering cell blocks of the Ohio Reformatory in Mansfield. Today, their evil spirits still prey on women, the elderly and the weak as they carry out their eternal sentences.

Off the coast of Venice, Italy, there is an island that legend says was formed from the ashes of all the dead who were burned and buried there. Locals and tourists are forbidden from visiting. Fishermen avoid the area because they say it's cursed. Poveglia Island is one of the world's dark epicenters and most legendary haunts. Join Zak, Nick and Aaron as they are, for the first time, locked down on an island - all alone.

Pennhurst State, a school for the developmentally disabled, was forced to close its doors in 1987 after numerous allegations of abuse and neglect. It's believed the tormented souls of the students still linger there.

Zak, Nick, and Aaron survived the 7 hour live lockdown. Now they present their findings and show us the best moments of the lockdown from 10/30/2009.

This Halloween eve special is a live 7-hour long marathon investigation of the Trans-Allegheny Lunatic Asylum in Weston, West Virginia. Join Aaron, Nick and Zak on their greatest adventure to date.