Medfield State Hospital, built in the 1880s and closed more than 20 years ago, is a little creepy but also pleasantly calm as one walks around the abandoned campus.

Payne got access to the hospitals by submitting formal requests to state mental-health departments. "Once a few states granted access, all the others followed suit," Payne told Business Insider.

The President of the Association of Public Psychiatric Hospitals in Romania (ASPPR), doctor Lucian Paziuc, draws attention to ...