ShowMap

Syntax:

ShowMap MapMarkerID, enableFastTravel (optional) 

Example:

ShowMap SecretDungeonMapMarker ; show SecretDungeon on world map, but don't enable fast travel
ShowMap NotSoSecretVillageMapMarker, 1 ; show NotSoSecretVillage on world map, and immediately enable fast travel to it 

Adds the specified map marker to the player's world map. The player will still not be able to fast-travel to this location until she actually travels there once

unless the optional enableFastTravel parameter is set to 1.