Entries tagged #postal-history on Unique.https://unique.rzen.dev/en-ushttps://unique.rzen.dev/reviews/pneumatic-tube-mail/https://unique.rzen.dev/reviews/pneumatic-tube-mail/For sixty years American mail travelled beneath the streets in steel canisters fired through pipes — and the numbers on the souvenir postcard were a lie.Fri, 14 Aug 2026 00:00:00 GMThistorypostal-historyinfrastructurenew-yorkvideo