Walkabout

From Wickipedia (linked above):
Walkabout refers to a rite of passage where male Australian Aborigines would undergo a journey during adolescence and live in the wilderness for a period as long as six months.[1] In this practice they would trace the paths, or "songlines", that their people's ceremonials ancestors took, and imitate, in a fashion, their heroic deeds. Merriam-Webster, however, defines the noun as a 1908 coinage that refers primarily to "a short period of wandering bush life engaged in by an Australian aborigine as an occasional interruption of regular work", with the only mention of "spiritual journey" coming in a usage example from a latter-day travel writer.[2]