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 cardiac conducting system is composed of five main elements which are mentioned here in the order of which an action potential reaches them. The sinoatrial node is the pacemaker of the heart and is situated superior to the sulcus terminalis of the right atrium, next to the opening of the superior vena cava.