City Under the Sea is one of several movies based on an Edgar Allan Poe poem and starring Vincent Price.
A lost undersea city is discovered off the Cornish coast after a local woman goes missing. She was kidnapped by one of the smugglers who have made it their home. None of the people there seem to age, this is due to the air. Gill men are used as slaves. After several adventures, a volcano erupts and the two men who went to look for the woman rescue her and they all make it back safe, after fighting the gill men off. The woman reminded the leader of the city, Sir Hugh of his late wife. When Sir Hugh escapes from the city at the end, he ages suddenly due to the change of atmosphere.
Sir Hugh is played brilliantly by Vincent Price and the movie also stars Susan Hart, Tab Hunter, David Tomlinson and John Le Mesurier (Dad's Army). Also in the cast is Tomlinson's pet hen, Herbert.
I have seen this movie several times and found it enjoyable. A treat.
Rating: 4 stars out of 5.