After being rescued from the Blood Harvest you find the driver of your rescue vehicle has become infected, and has crashed behind a massive asylum. The Trans-Allegheny Lunatic Asylum.
The campaign starts at the water tower to the North West.
You then pass though most of the buildings with various outdoor areas mixed in. You exit the building at the far south. The finally takes place inside the main lobby of the asylum.
Oh so this is an actual place in Google Earth? Just grabbed my attention. TRACKING!
Yes, very real.
The Ghost Hunters TV show on the SciFi channel did an episode there.
The asylum ran for over 130 years.
En.wikipedia.org