To find the location of an image use google reverse image search.
I don't know exactly what's happening in this forum recently, but some of the images being posted by (new) members claiming that they have taken the photos themselves on their travels are actually images that are identical (same view, same angle, same people in image etc) to those appearing on travel websites & tour operators.
I think, for the sake of clarity & transparency it would only be fair for those concerned to state any business interest they have in any of these websites.