Commands are not case sensitive so you don't have to put caps when you see caps in them below. In this Mod, we just changed the Map Flags of Mapmarker (FormID: 0x00000010) to all the data in Worldspace to Visible, Can Travel To. The pleasure of traveling will be compromised. The command for that is coc the town you are teleporting to.
You might not want to enable all the markers, so just teleporting there might be what you want. The second way is like a workaround for this. Please use this Mod if you are playing Skyrim well enough. First way is to run the command tmm 1 which enables all the map markers, which allows you to fast travel to anywhere you want. To use commands press the ' ~ ' button which is just below the escape key. All map markers will be in discovery state and fast travel possible. While doing this I had a location that kept crashing my game, and another where no enemies spawned even though I believe they should have been there, for this reason I added a few extra locations (bandit camps) just to be safe at the very bottom of the list. Spawning directly into a location makes your marker on the map not display properly until you leave to the open world which is why I often use exterior teleports to arrive at the location. To clear a dungeon you have to usually kill all the inhabitants, when you kill the final inhabitant a victorious sound will play and hovering over the location icon on the map will now display 'cleared' just under the name of the location.
