I gotta go with the classic "Ruins-in-a-dark-wood" for this one. I mean, its timeless really. Its a picturesque setting, it can house both giant spiders and undead monstrosities, and the ruins always have cool names like "The Dungeons of Thraxgar" or "The Tower of Ulthuun." And at the bottom there's almost always some sort of Vampire. Like I said, classic.