The caption could be extended to be more analytic and discuss toxic spaces/landscapes more generally. It is quite short. I like what is written but there are a number of things that could be explored in a little more detail. For example, who manages the river pollution? What are the discourses that circulate around the river pollution?
I think the caption could be elaborated to include more information about the consequences of the toxic sewage in the river, and also on the religious function of the river.