Mysterious Island (1961 Classic SciFi -Jules Verne- )

A group of Union soldiers, headed by Captain Harding and held captive in a Confederate prison, escape and steal a hot air balloon in order to evade their pursuers. A severe storm is in progress and the balloon is soon blown far out to sea. When the balloon begins to fail, the men try to keep it aloft, but eventually it crashes and the men find themselves washed ashore on an uncharted island. They are soon joined by two women who become shipwrecked when their boat is also destroyed in the storm. The group struggles to survive, but find themselves battling with a succession of giant creatures that inhabit the island. Always hopeful of being rescued by a passing ship, one day the group spies an approaching vessel, but it turns out to be a pirate ship that begins to fire on them. Just when the ship seems to be getting the upper hand, it is sunk by a mysterious explosion. The person behind the explosion turns out to be none other than the famous Captain Nemo, who has been carrying out research on the island for a number of years. Nemo has his ship, the Nautilus, with him, but it is no longer capable of traveling the sea, so the whole group is still faced with finding a way off the island. Then the island's volcano threatens to erupt.