Just back from a long weekend in Madrid. Despite best intentions didn't manage to run or use the hotel gym. Every day we seemed to walk for most of the day one way or another. However measuring it, the distances come out around 10k. A lot of the time was spent looking at things and sitting and watching the world go by.
I've put some distances and times into the 5x50 site but they are really guesses. Certainly by the end of the day I was tired and my legs were aching.