So perhaps like me you got a little turned around doing the quest titled “ city under siege” in ESO. I literally walked back to the beach after everything was done and it was saying that I had to go back to “Observe Balreth’s Attack“. Well after some Reddit searching I have finally found the crypt that I needed to go back into (Actually if you never leave it, once Balreth is awoken inside of the crypt, there will a portal that opens, that is the one you need to go into to end up being on board of the boat) If for whatever reason you decided to leave the crypt after you guys awoke Barleth here is where you need to be in order to get back to it. First on the main portion of the map, you need to click on is “StoneFalls”
once you are inside the Stone Falls part of the map, you need to click on the Davon’s Watch section
and finally your map will or rather should look like the picture below if so, Look on your map and find the fighters guild building, it’s got a sword as the marker on the map, when your standing in front of that building and facing it look to your left and go down the stair case. At the bottom keep going straight up and up the staircase on the opposite side which will bring you to a residential area. Down that street a bit there will be a little court yard looking thing and the biggest house on the right side is where you started the quest line. If stand in front of that house, turn around and look directly across the street. It’ll look like a wall but it’s the tombs entrance.