I'm at level 63 and my map is so full of places I've been to that it is overwhelming to say the least. What I want to know is, is there anyway to tell if there are places I have missed. In the past when I have visited a place it is "whited out" and before I leave I do a 360 to see if there are places which are still "black" which means I have not been there, but lately there are less and less, and I don't want to miss out on finding other places to go particularly if they help me max out on my level.
Silence is a virtue from which the prophets drew and none besides
This site has a map of Skyrim at The Elder Scrolls V: Skyrim @ GameBanshee . That page links to a nine page PDF that can be viewed or downloaded so that you can see the map in more detail. Both versions show all known locations, and their name, so you could then compare that to your game map.
I have the map that you suggest. What I was hoping for was a "Perk" or "Mod" that would modify the in-game map to show ALL places, so that I could detect those that I had not visited or cleared.
Silence is a virtue from which the prophets drew and none besides
I'm sorry, I misunderstood. I don't know of any mods which highlight non-explored locations, but you might be able to do that with console commands. There's an overview of the system at Console Commands (Skyrim) - The Elder Scrolls Wiki .
You could also try poking around the Skyrim Nexus mod site; most map modes affect visuals, such as removing clouds or adding markers for player houses, but there's at least one (The Cartographers Map Markers at Skyrim Nexus - Skyrim Mods and community) which adds map marker for camp sites and special locations.
There is a mod which I found on "wikia", but you loose all previous exploration travel. In other words no fast travel to previously discovered places. What a pity
Silence is a virtue from which the prophets drew and none besides
I've been everywhere man, well almost.