Complex sentence: Frequented by sailors from all over the world, it once held a dubious distinction as one of the world's most infamous promenades and red-light districts, where during WWII almost down every ally you could see the ladies of the night at work.
Split into simpler sentences: Frequented by sailors from all over the world, it once held a dubious distinction as one of the world's most infamous promenades and red-light districts. Where during WWII almost down every ally you could see the ladies of the night at work.