The Ruined Abbey

D&D adventure: This started off as a random encounter, which I elaborated on the fly. While traveling along an old road near sundown, the party sees a light like a lantern up on a ridge. The light stays in one place for a few minutes, bobbing and weaving, and occasionally flashing on and off, before moving along the ridge. The party decides to follow the light and does so for about two miles, back into the foothills of some mountains, eventually arriving at a ruined abbey. Even before they began exploring, the paladin said "I have a really bad feeling about this place, its unclean." They explored the abbey for about 20 minutes, until the ranger found the large bell laying in the bottom of the old tower and smacked it with his warhammer. A few minutes later, crows begin to flock to the abbey by the hundreds, cawing loudly and watching the PCs. Over all the racket the birds are raising, the rogue in the group think he hears chanting, very faintly and muffled. The group decides to leave, not even having explored the 1/3 of the abbey left above ground. They make it to a roadside inn an hour or so after sundown, and after a few drinks the ranger asks the innkeeper if he knows about a ruined abbey nearby. The innkeep goes pale, and said he did, that an order of monks used to live there about 100 years ago until it was discovered they were demon-worshippers and cannibals, and would lure travelers to their abbey by having one of the monks wait on a ridge near the road and lead them back. Once the monks finished their feast, they would ring the bell and place the discarded bits of their victims in the courtyard, where flocks of hungry fiendish crows would descend to devour the remains. The order was censured and destroyed by their parent church as blasphemous, but strage tales still speak of lights on the ridge, and that the ghosts of the former monks still exist there, attempting to lure travelers back to their doom for their infernal masters. All the players at the table looked at each other with looks of fear and disgust on their faces, and the paladin's player said "I KNEW that place was just wrong." Oddly enough, he NEVER tried to detect evil there.