John Driskell spotted that the Beeb had shown footage of the Italian Dolomites in a segment about yak herding in the Himalayas during the first episode of the Earth's Natural Wonders
The show was aired on Valentine's Day on BBC One - and eagle-eyed Mr Driskell, 74 was quick to notice the blunder.
He told The Times that any climber would recognise the scene as being the Dolomites.
He said: "I am beginning to lose faith in our much valued BBC."
The BBC was airing footage about Nepalese herders as they guided their yaks down a gorge.
The show's iPlayer edition has since removed the mistake.
A spokeswoman said: "When pointed out by a viewer, the error was immediately rectified, and the correct version replaced on iPlayer.
"This was a genuine mistake which we corrected at the earliest opportunity."
The BBC said the mistake was the result of human error.