The original film adaptation of Stephen King's novel, "Pet Sematary." It came out in 1989, directed by Mary Lambert, and is actually the first truly terrifying horror movie my parents let me watch when I was younger. I can still remember how much it haunted me for at least a week or so afterwards, especially because we had 2 cats at the time and live in a wooded area (perfect for the placement of a pet sematary).
The story follows the Creed family who moves to a rural area in Maine where they meet a local who shows them the old pet sematary. After their cat is accidentally killed, the local suggests that they bury him by the sematary, and that's when terror starts to unfold. The film (and novel alike) incorporates a lot of Gothic themes and deals with supernatural events. It's a fantastical twist on an otherwise ordinary family's life, and deals with the weight of trauma when families lose loved ones and deal with tragedies. What if you could bring back your beloved cat or your child after their sudden death? Would you risk them coming back as something unrecognizable? If this story proves anything it's that grief can do crazy things to our brains and make us lose all of our common sense (feeling over thinking), such as is the case in so much Gothic media.