There's no Such Thing
Appeared in
Uncollected: Every Story from Unreal, Unbelievable and Quirky Tails.
Story Summary
Chris' granddad is put in a sanitarium for claiming to have seen a dragon, but Chris knows his granddad will die without his garden and animals. The only way he can get his grandfather out is to get a picture of the dragon which proves a more difficult task than he imagined and in the end he gets something far better than a photograph.