London is somewhat unusual in that its streets are actually rather wide for a European city, due to urban planning regulations enacted after the Great Fire and

London is somewhat unusual in that its streets are actually rather wide for a European city, due to urban planning regulations enacted after the Great Fire and (until recently) the willingness of its inhabintants to demolish historical buildings. Paris, Vienna, or Prague, for example, are generally much denser, not to mention genuinely medieval cities like Girona.