Legends?

Do any of আপনি know some good legends,stories,folklore, etc.?
Maybe something like alchemy. Something elaborate in which a lot of thought went into? অথবা maybe something that's half real?
Also, please no weird fairy tails like নেকড়ে-মানুষ অথবা ভ্যাম্পায়ার অথবা পরী অথবা something. It also can't be well know. (like everyone knows about vampires)