There's a fanfiction where the Time Turner accident causes a time loop. Harry is stuck repeating the same day over and over again. Each time he tries different things to break the loop, and in the process, he discovers new aspects of his friends and the Hogwarts secrets. It's a really unique take on how the Time Turner can go wrong.
One unique 'Harry Potter Time Turner Accident' fanfiction is about Luna Lovegood. She has a Time Turner accident and finds herself in a parallel wizarding world where magic works differently. She has to navigate this strange new world, make new friends, and find a way back to her own world. All while dealing with the strange creatures and magic rules of this parallel realm.
I would recommend 'The Time - Turner's Secret Purpose'. Here, Harry discovers a hidden function of the Time - Turner while using it. The plot unfolds as he tries to understand this new aspect and how it can change the future of the wizarding world. It's a complex and engaging story.
One interesting 'Harry Potter Time Turner Accident' fanfiction could be where Hermione accidentally goes back too far and disrupts the founding of Hogwarts. This could lead to all kinds of chaos as the very foundation of the wizarding world starts to crumble. She might have to figure out a way to fix things before it's too late.
The fanfiction 'Time - Turner: Harry's Redemption' is quite good. Harry uses the Time - Turner to fix his mistakes from the past. He goes back and tries to make amends with those he has wronged, like Draco Malfoy, and in the process, changes the whole dynamic at Hogwarts.
The Time Turner can completely change the plot by allowing characters to redo actions. For instance, if a character fails a mission in the original plot, with the Time Turner, they can go back and try again, which might lead to a different outcome for the whole story.
There's a fanfiction called 'James Potter: Beyond the Veil'. In this story, after James' death, his spirit gets trapped in a strange realm beyond the veil. Harry, through some unforeseen circumstances, is able to communicate with his father's spirit. Together, they have to find a way to break free from this realm and also prevent a dark force from using this connection between them to gain access to the living world. It's a very different take on the relationship between James and Harry.
I've read one where Cibola was like a hidden magical library that only a select few in the Harry Potter universe knew about. Harry stumbles upon it and finds out that it holds the key to a powerful magic that could defeat Voldemort once and for all. It was really unique as it combined the mystery of Cibola with the main plot of the Harry Potter series.
Sure. There's one where Stonehenge is actually a magical prison for an ancient and extremely dangerous dark wizard. Harry and his friends accidentally release the wizard and then have to find a way to re - imprison him using the magic of Stonehenge itself. It's full of action and mystery.
There's a great fanfiction called 'Professor Snape's Unseen Allies'. It has a unique plot where Snape is not as alone as he seemed in the original story. He has a group of underground allies within Hogwarts, including some of the other professors, who are helping him in his mission to protect Harry. It gives a whole new perspective on Snape's actions and his relationships with the other faculty members. This fanfiction is full of twists and turns that keep you hooked from start to finish.
One unique 'Harry Potter Artemis' fanfiction involves a plot where an ancient magical artifact is causing chaos in both the wizarding world and Artemis' world. Harry and Artemis have to work together, along with their respective friends, to find and destroy the artifact. The story is full of action and adventure as they travel between the two worlds, facing different challenges in each one. It also explores how the two groups of characters with very different skills and backgrounds come together to achieve a common goal.
There's a fanfiction called 'Gilderoy's Secret Adventure'. In it, Gilderoy discovers a hidden chamber in Hogwarts that is not the Chamber of Secrets. This chamber contains ancient magic that could either make him a great wizard or destroy him. The story follows his journey as he tries to figure out what to do with this discovery, and how it changes his perspective on magic and his own abilities. It's a very different plot compared to most fanfictions about him.