What, pray tell, is your definition of culture? Are local cuisine and regional delicacies a part of it? How about accents, speech patterns, and slang/dialects? You mention architecture and cities, so do layouts of cities, differences in urban planning ideologies, planned vs organic growth, or style of buildings get accepted as culture?
If you’re going to dismiss any social differences between cities, then what is the difference or culture between any two modern cities in Amwrica, Europe, Asia, or anywhere else, other than the language they speak?
“If you ignore the culture, this city has no culture!”