The National Center for Mental Health (Filipino: Pambansang Sentro ng Pangkaisipang Kalusugan), is a 4,200-bed psychiatric hospital occupying 47 hectares of land in the city of Mandaluyong, Metro Manila, Philippines. It is PhilHealth-accredited. Due to its size and prominence in Mandaluyong, it is common (though insensitive) for Mandaluyong residents to be asked jokingly whether they live "inside or outside" the facility when mentioning their city of residence. History.
https://en.wikipedia.org/wiki/National_Center_for_Mental_Health