Your comment about the Royal Mile has suddenly reminded me of when (quite some time ago now) I was standing at the bar in a Parisian café having a quiet drink ( good tip, by the way, for anyone wanting a quick drink in Paris, as the moment you sit down the price automatically doubles). A rather brash young American lady came in from the terrace outside to query her bill. "20 francs for a Coke!" she exclaimed, "gee, that's nearly 5$!"
"Yes, madame", replied the barman, "and this is Paris".