Xibalba is a Shadowrealm that connects nine other realms. The realm is entirely one cave with few inhabitants. It is considered neutral territory and the Dark Elders use it to send messages to other Shadowrealms. Known as The Crossroads. Roughly translated the word means: place of fear. The cave has many stalagmites and stalactites. The Anpu cross it. It is also the place where Dr John Dee chose his distinctive aura scent of sulphur/brimstone/rotten eggs.