The patch notes from 22 September 2020 mentioned:
The world of Cairn has expanded. Areas previously inaccessible can now be explored. With them come new dangers, and rewards!
I've discovered one of such areas in Act 7 (Forgotten Gods expansion), it contains dungeon called Sunward Spire and it was already added to grim tools map:
I want to know about all of such "areas". Is there such information availabled?
I want to clear them all, but my character has already progressed through the game. If someone knows how to find such previously "inaccessible areas" so I can just check them all it would be also very helpful. I want to avoid re-running blindly through all maps. Can they be seen on the explored map?