Yesterday we were in the city of Guanajuato just for the day.  To see it properly you MUST take the funicular to the top for a view over the city. If you have time you could walk back down.  We did not have time because we only had about four hours to see everything.  We decided to do a day trip to this city instead of staying there after finding it difficult to locate an airbnb stay.  This is a challenging city to be on foot.  It is VERY hilly and while the town itself is nice and compact running the length of the ravine or valley it looks like everybody lives up an alley on the side of a hill.   I can only imagine what it must be like to live there.