IMO, and I could be wrong, but the drive from Minn/St Paul, other than the Mall of America in Minneapolis, has nothing of interest until you get to the Badlands, Custer STate Park, Crazy HOrse, Mt Rushmore area. Deadwood SD for a day and night, I found to be of interest.
Sinoatrial node is located at the junction of the superior vena cava with the right atrium.
When the sinoatrial node, the pacemaker of the heart, fails, the  atrioventricular node takes over as pacemaker. It is located  between the atria and ventricles in the heart â¦ . It paces the heart  at about 60 beats per minute.