During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.
Production companies：
Land Associates
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Amicus Productions
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Edgar Rice Burroughs Inc.
·
British Lion Films
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American International Pictures
·
Budget：$1,500,000.00
Overview：During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.
