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.
In general, although it typically cannot be seen grossly, the location of the sinoatrial node is on the roof of the right atrium at the approximate junction of the superior vena cava, the right atrial appendage, and the sulcus terminalis.