In the main square, at the left corner as you enter, there is this cool sign indicating the distance in kilometres to various points of the world :-)))
Madrid is at 9236 kilometres.
an unknown interesting curiosity:
on a map,draw a straight line between potosi (bolivia) and machupicchu.on this "spiritual" line,you'll cross ollantaytambo,cusco,pucara,taquile,tiahuanaco,oruro!!!