The Grotto Reservoir.

"Past many wrong turns one could find themselves within a hall of stone and statues below the chaotic fray of a ignorant city above. Upon exiting the endless hall the walls of stone and the statues of many men fall away to the seemingly endless grotto reservoir, preserved from the toil of man and the influence of politics. Instantly the false island before you grips your soul with it's purple hue ignoring the seemingly endless sea beyond it falling into the darkness that is broken by lights scattered upon the mass. When you turn around to flee to the dream of reality the hall of stone is at a distance too far to even think about reaching across the great sea."