Are you looking to add something to the operations?
If yes, then that's a "right nice siding" you got there. I can't tell exactly your timeframe, but judging from the loco, it looks like 1950s? Then perhaps a small-town coal and fuel oil dealer, a team track, and a scrap yard, all on the one siding...!
If you're looking more for scenic options, then how about a "war memorial park" (complete with cannon), road & parking for the station, and/or community park with bandstand and dock for rowboats.
Andrew