The Damned Story: In the early part of the 20th century, the state of Connecticut built a number of facilities to help treat children suffering from an array of illnesses, chief among them tuberculosis. As the debilitating disease was eventually controlled in the state, however, the need for so many specialty hospitals diminished, but rather than be demolished, a lot of the buildings were re-purposed as mental-health facilities. They often served as such for decades before ultimately being shuttered in more recent times due to budget constraints.
One such facility was Cedarcrest Hospital in Newington, which currently sits mostly abandoned, although some of the smaller buildings on the campus are used by state agencies and the FBI. At capacity in its heyday, the attractive facility tucked away in the woods just off of the Berlin Turnpike could provide treatment for 128 patients, which it did for many years before closing for good in 2010.
Of course, like the other abandoned former mental asylums in the state, various stories eventually sprung up about the facility, especially about the place supposedly being haunted, although there's very little evidence to support this premise other than "It's a former mental asylum." Those who venture near claim to have heard disembodied screams and doors slamming, along with reports of orbs and other spirit-like sightings.
Some (abridged) history of Cedarcrest Hospital from the Asylum Projects wiki:
The original facility was built in 1910, and was opened as the Hartford County Home for the Care and Treatment of Persons Suffering from Tuberculosis. More buildings were added, and two decades later it was renamed Cedarcrest Sanatorium, but continued to treat those afflicted with tuberculosis and other chronic diseases through the 1960s. In February 1976, the campus became part of the Department of Mental Health, and was reopened as a psychiatric facility under the auspices of Cedarcrest Regional Hospital, where it helped those who suffered from mental disorders and addictions.
As mentioned, the hospital was officially closed in 2010, with its residents being transferred to the Greater Bridgeport Mental Health Center and other facilities across the state. In 2012, the property was put up for bid, although there has been no official word on the status of any proposed sale. A few of the buildings—including one of the main hospital buildings here—have subsequently been demolished.
We were not able to find any specific instances of why it's believed by some that the property is haunted. It is, however, currently abandoned and as such, many of the buildings have fallen into disrepair, creating a creepy atmosphere.
Our Damned Experience: We have not visited Cedarcrest, and as it is not open to the public, we will not be stopping by any time soon.
If You Go: The former Cedarcrest Hospital is on Russell Road, just off the Berlin Turnpike in Newington.
Like many state facilities that have been closed, there is no trespassing on the property, so if you decide to visit without any sort of permission—which we strongly discourage—don't be surprised if you're escorted off the property and to a local police station, while in handcuffs.