Back in the old days, before the town was really built, this area was largely populated by vampires. This was before they were on friendly terms with majority of witches and wizards, so very few had those fancy rings that keep the dangers of sunlight away. Therefore, majority of the vampires lived out their lives underground. There is a MASSIVE network of tunnels and caverns here, some small, some large. If you venture here, be careful...it's very easy to get lost. As with Falls Alley, any human that gets found down here is fair game.