I recently watched an Australian classic Picnic at Hanging Rock
It's set in 1900 at an all girls school who go on a day trip picnic out to a place called Hanging Rock in Victoria. A group of the girls and a teacher end up missing, disappearing without a trace. The film then follows the events after the disappearance, the school community, teachers and community.
It was made a fair while ago but doesn't feel dated since it was set in the past when it was made, I really recommend some of ya'll check it out if it sounds interesting to you. I'm going to post some spoilers below so if you have seen it or just wanna know what happens have a look
There is also a new limited series based on it that's on Prime Video that i'm going to have to check out
ALSO. This movie is fucking GORGEOUS. The outfits, the cinematgraphy is just stunning.