I realised that after I posted it. But not being intentionally preserved bothers me. The category runs the risk of (1) trespassing on private property; or (2) being overwhelmed with crap. I'm hoping the requirement of a history of the place is enough of a restriction. I ended up voting for it because I think they'll start establishing clarity through trial and error of waymarks being submitted... if they don't want a bunch of private property partial sheds and barns.
And they gotta get rid of that Visit requirement for a GPS or person to be in the shot. That's so Virtual Cache.