1 - Blocked passageway – You must unlock an operation here and then complete it.
2 - Destroyed bridge – You must unlock an operation here and then complete it.
The above map presents locations that are more difficult to access, which you can visit while exploring the Exalted Plains.
The revealed passage
Point 1 on the map points to the passage covered with rubble, which blocks passage. To remove the rubble, you need to seize the point and return to the council room, at the hold. There, you can decide that your men should make passage to the location available. In there, you find swamps and a dragon.
The fixed bridge
Point 2 on the map marks the broken bridge. Without fixing it, you cannot access the nearby isle. You need to seize this point and return to the council room at your hold. There, you can decide that your men should fix the bridge to the isle. On the island, there is a fort full of the undead.