While there are many haunting and terrifying locations in Clair Obscur: Expedition 33, such as Renoir's Drafts or the Endless Night Sanctuary, the area that easily gives me nightmares is the Gestral Beach ascension tower. The ascension tower is a relatively straightforward mini-game, and the Gestral Beaches are meant to be a light-hearted or even relaxing break from the often bleak and depressing world inside the Canvas. In my experience, there is absolutely nothing light-hearted or relaxing about it, and it's arguably one of the harder challenges in the game (aside from maybe raft volleyball).