There could be a popular one where Elena and Caroline time travel to the era of the Originals when they were first turned. They get involved in the power struggles of that time and have to use their wits to survive. This would be full of political intrigue and action, which many fans might find appealing.
One interesting fanfiction could be where Elena and Caroline travel back to the founding of their town. They might interact with the original founders and change the course of some of the town's dark secrets. This would add a whole new layer of drama and mystery to the story.
One great Elena and Caroline lemon fanfiction is 'A Bond Beyond Blood'. It beautifully explores their relationship in a new and exciting way. The author does an amazing job of developing their characters within the story.
There's a fanfiction called 'Elena and Caroline's New Adventure'. It takes place after the events of the show. They decide to leave Mystic Falls for a while and explore the world. Along the way, they encounter other supernatural beings and have to rely on each other. It's a fun and exciting story that shows a different side of their relationship.
A plotline could be that Elena and Caroline go back in time to a period before they knew each other. They then get involved in each other's lives in different ways than in their original timeline. This could lead to different relationships forming, not just between them but also with other characters like Stefan and Damon. They might also go back to a time when a major threat to the supernatural world was just emerging and they try to stop it before it becomes a big problem in the future.
It's also appealing because it allows fans to see a different side of the characters. In the fanfiction world, the characters can break free from some of the constraints of the original show. For example, they can have more in - depth conversations and experiences that might not have been possible in the main storyline. This gives fans a chance to really dive into the relationship between Elena and Caroline.
Another theme is the development of characters' emotions over time. As Stefan navigates his love for the two, we see how Elena and Caroline also grow and change in their relationships with him and with each other. For example, in some fanfictions, they might start off as rivals but end up as friends who understand each other's connection to Stefan.
Another theme is changing the past or future. Sometimes Elena tries to fix things that went wrong in the past or prevent bad things from happening in the future. This can lead to some really complex and interesting storylines as she grapples with the consequences of her actions.
I've read 'Elena Through the Ages of Time Travel'. In this fanfiction, Elena's time travel is not just about going to the past but also to different possible futures. It's full of mystery and exploration as she tries to figure out how to get back to her original timeline while also learning important lessons about her own life.
I really liked a fanfic where Elena and Kol time travel to the Middle Ages. It's a bit of a different take as they have to navigate the social norms of that time while also dealing with their own feelings. There are some really intense and romantic scenes in it. It shows how their characters develop in a new and challenging environment.