I've spent extensive time in all of these except prisons, and I can tell you the difference is stark. What explains that? Is it all just down to expensive trim and interior decor? I'm sure that plays a part, but that was never my main impression. Instead, it comes down to the layout and light and feel: it's clear when a building, however regular and rectangular, is designed to support and empower the occupants and when it's designed to control and direct.