Idea for #mastodon compatible web app, maybe compatible with existing API:
Get permission to read user statuses, select statuses with images withing given time period, marked by given hashtag, and output the images in fullscreen format, using scrolling or paging, creating kind of blog or presentation.
It would just allow for easy converting Mastodon timelines of images, posted by travellers, into simple chronological fullscreen presentations, from oldest to newest, without any unecessary GUI overhead on screen.