Enable debug mode by setting your two INI files as follows:
DebugMode = 1
; Set to 1 to activate the debug panel
DebugPanel = 1
; Set to 1 to disable OverlayDebug system
OverlayDebug = 0
Files are located in ~DocumentsMy GamesSid Meier’s Civilization 5
Once in the game press "~" to open the debug menu. You can reveal all, edit cities etc.