All over turn of the century office buildings are ornate mail boxes in the lobby. They were part of the ingenious Cutler Mail Chute system, connected to the floors above by brass and glass chutes that letter senders could pop their correspondence in, to be whisked away to the lobby and collection by the postman. Some of the designs are simply glorious! There are about 800 all in all still around, many of them still operational and able to be used! I set off for Atlas Obscura to track some of them down.