In DD what is the world Called

In DD, What is the world Called allso what other major City are there beside Waterdeep

DnD is a rule system. It has no set ‘world.’ The world you’re thinking of is the ‘Forgotten Realms’ setting, on the world of Toril, the continent of Fae-Run or something like that. Neverwrinter, Baldur’s Gate, Silvermoon, Lusken, and other stuff are large cities. Maps are available all over the internet.

The “first” setting was Greyhawk, methinks.

Thanks all thing i am ask is for a Story i am writeing

Indeed 'twas. Greyhawk kinda died out, though. It was sad.