Underdark

The Underdark: To common knowledge, the underdark does not directly connect to the pit. Escaping to the underdark is one means of leaving the pit, though the means of doing so are up to the PCs. This could mean tunneling , spelunking , exploring, information gathering etc. The closest the pit gets to the underdark is a location at the very bottom and most remote and dangerous reaches of the pit (this may or may not be under water).

Underdark

The Pit sarcadian