Living in Miami, occasionally we would get "Dense Fog" advisories from the weather service. I love fog, it is some of my favorite weather. In Miami, I was always disappointed. Sure, there would be a little fog, but never really dense enough. I realize this was probably due to the location of my house. We lived just blocks from the water, and had pretty good breezes. Out west near the everglades I imagine conditions were different (actually, I am sure they were based on some early morning trips out there).
This morning we had dense, Northwest fall fog. You couldn't see the houses across the street kind of fog. I love it. (and of course didn't think to take a picture...). Fall has arrived (until at least next week).