During WWII, the British and US government teamed up the Bicycle Playing Card Company to create a deck of cards that contained maps of escape routes for POWs escape to freedom. The cards needed to be soaked and peeled apart to reveal the maps. (i.redd.it)

During WWII, the British and US government teamed up the Bicycle Playing Card Company to create a deck of cards that contained maps of escape routes for POWs escape to freedom. The cards needed to be soaked and peeled apart to reveal the maps. (i.redd.it)

via /r/MapPorn https://ift.tt/3focIUE

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