Propably some trash under that hay. Maybe a crate if you are lucky.
Something unusual: Just had a hordenight. Only a few zombies showing up and like 10 vultures circling in the sky, so high i could barely see them, let alone shoot them. They just stayed there the whole night until right before 4am. Damn birds denying me my XP...
Something interesting. I saw a POI that had an actual treehouse the other day. I haven't explored it yet, but I've marked it on the map to check it out.