supertux/data/levels/world4/worldmap.stwm

(supertux-level
  (version 3)
  (name (_ "Mountain Peak"))
  (author "Nobody!")
  (contact "https://supertux.org")
  (license "CC-BY-SA 4.0 International")
  (icon "/images/worlds/icon/mountainpeak.png")
  (icon-locked "/images/worlds/locked/mountainpeak.png")
)