During World War I, a German U-boat sinks a British passenger ship and takes the survivors aboard. After getting lost in fog, the submarine surfaces near the unknown island of Caprona, a lost world where they find dinosaurs and Neanderthals.
islandbased on novel or booksubmarineworld war iprehistoric creaturedinosaurantarcticasouth sea islandneanderthallost islandlost worldisolated islandmessage in a bottlevolcanic islandgerman u-boat fleet
