The signal pools is a group of lakes in Midgard , within the Second Halfling Kingdom . It's waters flows from the Silver peak mountains and flow into giant underwater reservoirs... and into what is rumoured to be an actual underground sea either places or located by Ranimsul in order to guarantee a Render free place for the Halfings to live in.
The five large signal pools are named after the first 5 Halfling kings and queens.