The Diabolical Dr Z (1966, Jess Franco).
To describe this using mere words would do it an injustice. Felt it might have been trimmed though?? (tis the Mondo Macabro dvd), regardless it contains many great images helped along by the crisp B&W/cinematography etc.
Easily goes into my top 100 (which has about 1000 films in it now
)