Seeing a mental hospital in a dream signifies a bathhouse, because bathhouses are places where private parts are uncovered and, according to the source, where jinn and devils and ugly acts may be present.
At times, seeing a mental hospital signifies a school, because schools are places where children gather.
It may also signify places of play, confused and mixed sounds, false and meaningless words, and the loss of wealth.
If a poor person sees a mental hospital, it signifies blessing and comfort that they will attain and no longer needing to ask people for anything.