Halloween at the Asylum

Three

It's Halloween again, and of course, you have not been invited to a single party, and you are way too old to go trick-or-treating. You are home alone, sitting in front of your TV and bored to death - not literally.
During a particularly stupid commercial, you look out of the window, sighing, and your gaze falls upon the dark silhouette of your local abandoned asylum in the foggy distance.
Lightning illuminates the sky and you suddenly have a very sane and rational idea: Why not pay the old place a visit?
After seemingly coming a long way, you find yourself in front of the asylum. All the windows are broken or nailed shut, and a lonely raven perches on a nearby dead tree. It caws and takes flight to the back of the huge building.
Go in through the massive front door?
Follow the raven to the back door?