I do not mean to be rude but I am not talking about the 'tmm 1' command!
Same with Oblivion (Not sure if it works there as well), I would find LOADS of locations, but is it all of them? Now in the past, we would/may of done a familiar command: tmm 1. It shows all map markers as if you discovered them already and can fast travel there even if it is your first time, but you cannot help but feel you took the fun of discovery out of it and the fact it feels like cheating or you cannot find which locations you have actually discovered.
Well, thanks to a thread over at the Steam forums I found a console command that reveals all map markers on the Skyrim map but you cannot fast travel to that marker just yet!
Enter EXACTLY as shown:
tmm 1,0,1
Ta da! Now you just enabled a command that acts just like the Explorer perk from Fallout 3/Fallout: New Vegas. It shows the location but you cannot fast travel there just yet!
Happy hunting!


