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 sinoatrial node and the atrioventricular node controls the Cardiac Cycle-The Sinoatrial node is often called the Pace maker. The sinoatrial node is located in the wall of the right atrium.