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.
Baylor Heart and Vascular Hospital Center for Complex Arrhythmias. The Normal Heart's Conduction System. The cardiac impulse originates in the sinoatrial node (SA node), located in the right atrium and activates first the right atrium then the left atrium. The general direction of the atrial activation is inferiorly, to the left, and posteriorly.