Legends?

Do any of bạn know some good legends,stories,folklore, etc.?
Maybe something like alchemy. Something elaborate in which a lot of thought went into? hoặc maybe something that's half real?
Also, please no weird fairy tails like ma sói hoặc ma cà rồng hoặc nàng tiên hoặc something. It also can't be well know. (like everyone knows about vampires)