London Black Taxi One of 4) London's most famous attractions is the black cab. This type of cabin carried passengers for almost 200 years. around London 5) Every black taxi driver must pass a special test called Knowledge before he gets his license. To get through, they must explore every street. 6) London. This is more than 7) 25,000 streets! Although they are quite expensive, you know that you will reach your destination as quickly as possible 8)!