I'm not entirely sure specifically what 'nuovo olimpo based on true story' is about without more context. It could be a movie, a book, or some other form of media that is based on a true story. Maybe it's about the experiences in a place called Nuovo Olimpo.
Nero Wolfe in 'rex stout nero wolfe complete 47 novels' is a very unique detective. He is overweight and prefers to stay in his home most of the time, but his mind is sharp as a tack. He uses his deductive skills to solve various mysteries, often relying on his assistant Archie Goodwin to gather information for him. He has a passion for orchids and a refined taste in food, which are some of his distinct characteristics.
Well, one possible scary story could be about a tragic event that occurred in the past in Sycamore Park District. Maybe there was an accident where someone died, and now there are rumors of their spirit lingering. Another could be related to an old abandoned structure in the district. People might say that if you go near it at night, you can hear screams or feel a strange coldness. There could also be stories about strange animals that are seen in the park that seem otherworldly, like a large black dog with glowing eyes that vanishes when you approach it.
Some popular ones could be 'Persepolis'. It tells a powerful story about growing up during the Iranian Revolution. Another is 'Maus', which uses animals to represent different groups in a very unique and impactful way to tell the story of the Holocaust.
I don't know the exact nature of the true story. It could be a historical event, like something related to the founding or development of Nuovo Olimpo.