This place is on private property. Listing for informational purposes only. Please do not visit without express permission from the land owner. Opened in 1896, and abandoned in 2007, Overbrook insane asylum is frequently patrolled by police cars and plainclothes officers. However, this doesn't stop many bored teenagers and adventure seekers from exploring the abandoned buildings. Recently, the state of NJ has planned to convert the historic site into 90 acres of parkland. While much of i...