The Blancheville Monster (1963)

Starring Gerard Tichy, Leo Anchoriz, Ombretta Colli, Helga Line, Iran Eory
Directed by Alberto De Martino

(actor & director credits courtesy IMDB.com)

A young woman returns to her ancestral castle for her 21st birthday, only to be stalked by her disfigured father, ready to fulfill a prophecy that requires her death.

This moody psychological thriller starts out with a bang as the camera pans through a leafless forest during an electrical storm before moving to the dark foreboding castle in the background illuminated by lightning.  With a very atmospheric music score, and dark shadowy photography, there's much for the horror fan to enjoy, as we're introduced to the characters, with Colli's innocent damsel discovering her brother, his doctor, and their housekeeper all possessing dark secrets that will eventually be disclosed.  Although the film introduces its "monster" early on, I did find the story a bit slow-moving with numerous scenes where not much happens.  Nonetheless, this is still a work of quality, which looks great and is worth additional viewings.

Medusa Vs. The Son Of Hercules (1963)

Starring Richard Harrison, Anna Ranalli, Arturo Dominici, Leo Anchoriz, Antonio Molino Rojo
Directed by Alberto De Martino
(actor & director credits courtesy IMDB.com)

The cruel rulers of Argos use a savage dragon and the Medusa, whose gaze turns men to stone, to cut off the city of Serifo's trade routes, but the young hero Perseus leads a challenge against them. 

This Italian film, originally titled Perseo l'invincibile was one of several films dubbed and repackaged for American television in The Sons Of Hercules series, which is the source I was able to see this from.  Ironically, according to Wikipedia, Perseus was actually a half-brother of Hercules, but that's hardly worth quibbling about, when the film is only a very loose adaptation of his mythic adventures.  Harrison, although per IMDB starred in a number of sword & sandal films, is an interesting choice here.  He's far from the musclebound hero of other films of this type, and in fact never takes his tunic off.  The film's entertaining enough but focuses more on the conflict between the cities than the monsters or the mythology.  As for the monsters, they're portrayed by men in suits and are very distinctive looking, with the toothy dragon rising from the sea to attack its victims, and Medusa resembling a giant walking plant with a single glowing eye.  They might not pass muster by today's standards, but I certainly found them fearsome and unique.  There's also a number of interesting names in the cast and crew, according to IMDB, with Black Sunday's Arturo Dominici playing the villainous King Acrisius, The Good, The Bad, & The Ugly's Antonio Molino Rojo playing Tarpete, Carlo Rambaldi (who later worked on Alien and E.T.) providing the special effects, and Amando de Ossorio (a writer & director of several Spanish horror films) credited with visual effects.