What does the castle look like in Dracula?

From the text:

The castle is on the very edge of a terrific precipice. A stone falling from the window would fall a thousand feet without touching anything! As far as the eye can reach is a sea of green tree tops, with occasionally a deep rift where there is a chasm. Here and there are silver threads where the rivers wind in deep gorges through the forests.

But I am not in heart to describe beauty, for when I had seen the view I explored further. Doors, doors, doors everywere, and all locked and bolted. In no place save from the windows in the castle walls is there an available exit. The castle is a veritable prison, and I am a prisoner!