Why do the magnetic field lines of the earth go from south pole to north pole?
That was a curiosity that I also had once. 
The reason for that is that the magnetic pole near earth's geographic north pole is actually the south magnetic pole.
You can find a more detailed answer on https://wtamu.edu/~cbaird/sq/2013/11/15/why-does-a-magnetic-compass-point-to-the-geographic-north-pole/

Happy Thanksgiving!