In the show "Stranger Things", where do the boys discover Eleven?

In Stranger Things, the boys discover Eleven in the woods near Hawkins, Indiana. Mike Wheeler, Dustin Henderson, and Lucas Sinclair are searching for their missing friend Will Byers when they encounter the frightened, shaved-headed girl wearing a hospital gown.

The woods are specifically associated with Mirkwood, a forested area near Hawkins. Eleven has escaped from Hawkins National Laboratory, where Dr. Martin Brenner subjected her to experiments involving her psychic and telekinetic abilities. She is initially unable to explain who she is, so the boys hide her in Mike's basement.

A common mix-up is saying that the boys find Eleven in the Upside Down. The Upside Down becomes central to the story, but Eleven is discovered in the ordinary world, outside Hawkins, shortly after escaping the laboratory. Their meeting sets up the show's main mystery: Eleven's connection to the laboratory, the Demogorgon, and the alternate dimension.