London - The Knowledge

A common sight in London is someone on a scooter with a large map on a holder in front of them. They are trying to gain "The Knowledge" necessary to become a taxi (or rather hackney carriage) driver. 

To pass the drivers' exam they have to know 320 routes in Central London along with tens of  thousand of roads and places of interest. Gaining the knowledge takes an average of three years.

In the era of satellite navigation and Uber cabs this may seem like an anachronism, but the British like their traditions.