Luna is a Ravenclaw student one year younger than Harry in the Harry Potter series. Her mother died doing wizarding spells when she was nine and Luna witnessed it which allows her to see Thestrals, a trait she shares with Harry. Luna brings an ethereal quality to Hogwarts and loves the woods and all the birds, beasts, plants and insects that inhabit therein.
Luna would likely have loved geocaching as she was capable of “thinking up 10 impossible things before breakfast" according to J.K. Rowling.