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.

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.

Poveglia Island, off the coast of Venice, Italy, is one of the world's darkest epicenters. According to legend, the island was formed from the ashes of burned plague victims, criminals and mental patients who were exiled there.

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.

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.

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 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.

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.