The Labyrinth (of Jareth) Masquerade Ball is an annual dance and narrative theatrical event, based in Los Angeles and inspired by the As The World Falls Down sequence from Jim Henson’s Labyrinth (Fanfare). Photo galleries of attendees’ elaborate costumes from the last seven years: ’13 ’14 ’15 ’16 ’17 ’18 ’19. (The ball is planned to return in 2022 after two years of health and safety concerns.) An article at Cosplay Culture goes into more detail about the ball’s evolving storyline and how much work goes into it each year.