In Greek mythology, Calypso was a nymph who lived on the island of Ogygia, where, according to Homer's Odyssey, she detained Odysseus for seven years. She promised Odysseus immortality if he would stay with her, but Odysseus preferred to return home.

A nymph is a minor female nature deity in ancient Greek folklore. Distinct from other Greek goddesses, nymphs are generally regarded as personifications of nature, are typically tied to a specific place or landform, and are usually depicted as maidens. They were immortal like other goddesses, except for the Hamadryads, whose lives were bound to a specific tree.