My goal: visit a point of interest in every US county! Orange is May

As best as I can tell, no one has ever properly visited every U.S. county (some have passed through all of them but not stopped and seen something). I'm trying to be the first. This May I hit a big milestone of crossing 1,000 counties where I've seen a point of interest, so I'm about a third of the way. I've been documenting all this on my YouTube beachboysandrew