I just killed Baal at lvl28 and in the mine, I found 2 non accessible area.
1) There a gate door on the north eastern end part of the map(cave overall map), where I saw a key outside the door, lying under pieces of broken vases, which I cant pick it up. I try move around but there seems no way I can pick up the key, since no item interaction tab pop out
2) There a hidden room in the south western part of the cave, where I found the room by pressing a hidden switch beside the wall. When I enter the room, there is another button in it, which after I press, a second hidden room with chest will be reveal, but I will get lock in the first room, because the wall/ entrance to the first room will close back once I press the button in first room.
Hope someone can help with the 2 situation above. Thanks