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.
A group of heart cells called the sinoatrial node (also SA node or sinus node): 1  Sends electrical impulses to other areas of the heart, telling the heart when to contract, or beat. 2  Responds to changes in physical activity, mood and hormones by increasing the heart rate. 3  Slows the heart rate during sleep.