Legends (derived from latin, legenda) are stories in oral tradition and a narrative of human actions. They are usually very old, to prove them, but are believed to have taken place within human history. Legends are often passed on by word-of-mouth. Legends have often been transformed over time to keep them realistic. They are very similar to myths, but myths try to explain what happens in the world, while legends do not necessarily.
Examples of legends are Ali Baba, the Fountain of Youth, Paul Bunyan, Kraken, the Loch Ness Monster, and Bigfoot. Some legends are stories about real people; others are not. Odysseus and Robin Hood for example may have been real but most the stories about them are definitely fiction.