When I visited Penzlin Castle some time ago, the small tour allowed a view into the old smoke kitchen but when entering, the room entirely was just black and dark, only some details and corners were rarely illuminated by small spotlights.
The open fire-place itself was not really visible and all appeared quite spooky although this really used to be the place where meals were cooked for the former owner of the ancient castle and his guests. So here you get only a more imaginative idea of how primordial, rural, smoky and simple life used to be mostly during these medieval times.
This photo shows a view of the funnel vault from 1520 with a 12 m high chimney which was also utilized for smoking fish or meat. The light conditions were really poor but at least some tools did emerge from this more creepy darkness.