My internet friend Titus began driving and blogging the Great River Road up the Mississippi River years ago. Etta and I followed in his digital and real life footsteps. He has written many excellent posts about the journey (just search “river road”) on his blog, Smokin’ Chokin’ and Chowin’ with the King.
3rdarm.biz 
If you want to know where the water goes, follow it down through the mud flats, out of town.