Creating a photo dump on story is easy. Start by choosing the photos that you think fit together well. Open the story option on your app and upload them one by one or all at once, depending on the platform. You can also play around with the layout and add captions or stickers to make it more engaging.
I'm not sure specifically as I haven't read this exact 'the rubbish dump short story'. It could be about various things like the life around a rubbish dump, the people who work there, or the environmental issues related to it.
It depends on your personal preferences. If you're not enjoying them anymore or they no longer hold your interest, then maybe it's a good idea to let them go.
The scariest elements could be the unknown. In a dump, there might be strange noises as things shift in the dark. Maybe there are wild animals rummaging around, which can be very frightening.