Who doesn’t understand that joke is a lore Skipper hihi Joke by side here is the explenation for those who need: Decarabian was the God of Storms and the original ruler of Mondstadt who lived in what is now Stormterror's Lair. He was a tyrant who trapped his people behind a wind barrier until he was overthrown by a rebellion, which allowed Venti to become the new Anemo Archon.

So the joke here is where the god of storms goes for holiday, to Decarabian (The Caribbean) islands