Center of Osgiliath(e, nw and sw)

You are walking over the great island that forms the center of Osgiliath. A mighty stronghold this must have been in days of old, but only crumbling stone remains now, a mere ghost of the past.
The citadel of Osgiliath stands west of here, and you think you might be able to enter if you head southwest.
A foul brown haze covers everything.
The only obvious exits are east, northwest and southwest.