The center of Osgiliath(se 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 south of here, but you can't see any means of entering it from here.
A foul brown haze covers everything.
The only obvious exits are southeast and southwest.