You should visit Mary Shelley's House of Frankenstein in Bath. That is a brilliant museum for anyone who loves Frankenstein and Mary Shelley. I went there and it was amazing and very creepy. You can even go into a pitch black narrow dungeon area, but that is not for someone afraid of the dark or who is claustrophobic, which is why I didn't go down there. There is also a giant replica of Frankensteins Monster
Always great to see Mary Shelley transcending to new generations where Frankenstein still manages to stay relevant to modern society even after 200 years. The 1818 edition is still the best!