This is a nice, satisfying telling of the Verne story, with special effects by Ray Harryhausen and a good score by Bernard Herrman. Escapees from a Civil War prison camp are blown way off course in a balloon they stole. They find themselves on an apparently deserted island somewhere in the Pacific, are joined by two women who were shipwrecked, and eventually come face-to-face with Captain Nemo and the wrecked Nautilus.
They have to deal with pirates, an erupting volcano and Harryhausen's creature threats. These include very large versions of a hungry red crab, an aggressive chicken (or dodo), a bee and an unhappy squid. Some of the creatures turn out to be very good boiled or roasted.
The movie holds up well because of a strong story, good action, and fairly well-defined characters. It features Herbert Lom, in my view an under-rated actor, and Joan Greenwood. By this time Greenwood was taking character parts and doing a lot of stage work. But from the mid-Forties to the mid-Fifties she was, I think, one of the sexiest, smartest actors Britain has ever produced. Her plummy, smoky voice is inimitable.