Classic stuff , Its too bad they don't make films like that anymore."Jason and the Argonauts" (1963)
First saw this classic fantasy film during my childhood, and ended up being absolutely terrified of those morphing skeleton warriors - had nightmares for days as I recall!
Never tire of repeat viewings, especially the brilliant stop-motion special effects by the SFX God himself, Ray Harryhausen!
The story is fairly routine, but the film lives off the battle-scenes, and the mythical gods such as Talos, and the hydra amongst others. But it will always be those creepy, gaunt, "smiling" skeletons that most people will remember: which is an awesome feat for a 54 year old film competing in a contemporary era of unmemorable CGI!
*Interesting footnote - Todd Armstrong (who played "Jason"), only got the leading part because of his looks rather than acting ability. Moreover, the studio couldn't afford big stars due to a lot of the budget being allocated to Harryhuasen's time-consuming special effects. Armstrong would later commit suicide (1992) due to painkiller-addiction.