Sen's Fortress - p. 5 | Walkthrough Dark Souls Guide
Last update: 11 May 2016
Move along the wall lighted with sunshine and then turn right.
Note! On the high narrow bridges you can choose two paths. If you jump over the gap in the bridge (screen below), you'll get to the tower occupied by a Crestfallen Merchant. At the bottom of the tower you'll find also Cell Key. You can also jump down from the destroyed part of the passage - you'll find there Sniper Crossbow. But you do not have to go to these optional locations.
Run inside the tower, to hide from bombs.
There is an undead knight in the left part of tower.
But the further way leads in the opposite direction. What's interesting, in the next tower you can enter the cell and go down to the bottom of the location (but you shouldn't do it now, because you need Cell Key).
At the top, prepare for the last difficult moment before meeting the golem. You have to run over a narrow path on a rectangular plan. Run ahead and do not stop - there is an archer waiting for us on the other side and the golem will throw a bomb again.
Kill the archer and enter the tower. Go up to deal with golem (he won't respawn once killed). During the fight, try to stay behind him. This monster is quite slow and you can jump to a safe place between his legs.
After killing the golem you're ready for the next fight with Iron Golem.
Once you defeat this beast, examine a shiny circle in the floor. You'll be moved to Anor Londo.