I saw this at the Pearl Road Drive-In Theatre in Ohio back in the early 60s. I was a youngster and to this day, I remember every single spectacular special effect from the huge Iron Talos, to the Harpies to the Immense Poseidon and the Clashing Rocks to the tremendous 7-headed Hydra and the battling skeletons (especially the one that gets it's head chopped off! WHAT an adventure. I've seen this film many times since and had the pleasure of introducing my own kids to thiis film right around the age I was when I first saw it. AND sure enough it is now their favorite adventure film too -- heck with those (in all honesty) pretty spectacular CGI effects in every other blockbuster film made these days -- impressive as they are, those films are NO "Jason and the Argonauts"!!! It's something about the sheer imagination of the scenes and those spectaculat mythological creatures, and a story that is truly gripping and SO imaginative. Its actually a "Greek" Road Movie (or I guess make that a "Greek Argonaut Movie" with genuine suspense, a spectaculat film score by Bernard Hermann (who did those great Hitchcock film scores from "Psycho" to "Vertigo" and (Of Course"!!!) the Harryhausen special effects! This film is a classic and I hope someday the AFI will give it the recognition and status it deserves so it will be preserved as an enduring classic for generations of kids (and the Kid in all of us!!!) to enjoy for years and years to come!