In the Artorias of the Abyss DLC released on both PC as part of the Prepare to Die edition and on Xbox 360 and PS3, you travel back in time to an era not completely swallowed by the abyss, to the sunset of this civilization just before its deep, dark night.
In scenes where we stare out at what I presume to be the back side of Anor Londo (a portion of the city we see but never visit in Dark Souls) the sky is the same color as the perpetual sunset over Anor Londo in the first game.
And like many PYO farms, Bunnell is solidly in on the corn-maze craze as well - if you happen to arrive after sunset, they will even loan you a flashlight and let you stumble around in the dark.