Slow down and look around: when rays of sunlight through the palm-frond roof illuminate a lute maker at work, you have found the Instrument-makers' Souq (Souq Kimakhine), and if you glimpse sparks flying as old bicycle parts are re-fashioned into lanterns, Blacksmiths' Souq (Souq Haddadine) has found you.

BBC: Get lost in a Moroccan souq

In 1892 two brothers opened a bicycle shop in Dayton, Ohio and soon turned their minds to how a flying machine might work.

ECONOMIST: How Robert Penn found himself the perfect two-wheeler