While usually a walk outside will result in a cool rock, a pretty leaf or if you're me, an overpriced iced coffee that magically found its way into your hands, for others, hitting the streets can lead to a whole lot of even rarer finds — just ask the fine folks of r/MildlyInteresting. 

From seven leaf clovers, to abacus-calculator combos and even a receipt for a Ford Model T, here are 20 crazy things people found while out in the world.