You could look at it directly as a presentation and discuss the different aspects of Autumn being shown in each of the photos.
You could print off and laminate the photos to make an interesting, eye-catching display about Autumn.
The students could also take the laminated photos and sort them into different aspects of Autumn. The students can then use the cards to create a poem.
The photos could also be used as prompts for creative writing, factual writing or descriptive writing.