| ||This article is a stub. Please help Poptropica Wiki by expanding it, adding pictures, and improving existing text.|
The Secret Sanctum is a secret hideout on Astro-Knights Island. It can be accessed by the fountain. The entry code can be found on a slip the Goth Girl gives you (after you give her your secret). Inside, there is a secret organization, who formerly followed Mordred, and now follows Elyana.