Once the debug mode has been activated using the baldur.ini file, bring up the console with ctrl+space and type in CLUAConsole:MoveToArea(~AR****~)
Where **** is is the number of the area.
Here are some of the codes I know:
AR0700-WAUKEEN'S PROMENADE
AR0400-THE SLUMS
AR0300-THE DOCKS
AR0800-THE GRAVEYARD
AR0900-THE TEMPLE DISTRICT
AR1000-GOVERNMENT DISTRICT
AR1300-DE'ARNISE HOLD
AR1100-UMAR HILLS
AR1200-WINDSPEAR HILLS
AR2000-TRADEMEET
AR1404-TEMPLE RUINS
AR1900-DRUID GROVE
AR1500-SPELLHOLD
AR1600-BRYNNLAW
AR2300-SAHUAGIN CITY
AR2100-UNDERDARK
AR2200-UST NATHA
AR2800-SULDANESSELLAR