Hidden within the game files is the Explorer perk. Those who played Fallout 3 and New Vegas will know this as a perk that revealed all the locations on the map.

For whatever reason, this perk was coded into the game but never used. So I decided to restore it.

What the perk does is that it will reveal all map markers on the map. You cannot immediately fast travel to them, as this was how Bethesda had intended it.

The perk is now a rank of the V.A.N.S perk (I'm so sorry, it was the only place it made sense to put it.)
It is obtainable at level 18, in between the 1st and now 3rd rank of V.A.N.S.

Because Nuka-World adds a new rank of V.A.N.S, this will require Nuka-World.

Also adds a loading screen for the new perk.

Be aware, this will only reveal map markers that are currently in your game. If you download any mods that add extra map markers after acquiring the perk, they will not be discovered. It WILL reveal markers from mods, though.