Fallout 4: The Glowing Sea Map Fallout 4 Guide

The above M8 map shows the eighth sector of the world map in Fallout 4. It's the southwestern part of the game world which is highly radiating and due to that unavailable during the early phase of the game. Yellow dots on the map mark locations in which you can start some quest (main, side or faction one). Red dots symbolize other locations. You will not unlock any quests there, but they might be related to quests started in other parts of the game world.