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.
The AV Node takes the signal from the Sinoatrial (SA) Node, slows the signal down and regulates it, and then sends the electrical impulses from the atria to the ventricles (bundle of His).