London black cab drivers must first pass The Knowledge, a multi-sequence oral exam requiring memorization of all 25,000 street names, landmarks, and points-of-interest in a 6 mile radius from London center. 00
fact
London black cab drivers must first pass The Knowledge, a multi-sequence oral exam requiring memorization of all 25,000 street names, landmarks, and points-of-interest in a 6 mile radius from London center. 00