Which cities have the most interesting housing stock?

I’m mostly asking about houses but feel free to include apartments and other types of housing. Which cities have the most interesting residential architecture?

For example San Francisco has pretty interesting homes with lots of Victorians and Mid Century homes and plenty of other styles like 1920s bungalows.

A more affordable example might be Houston which also has some interesting older homes with character.

An example of a city with less interesting homes is Phoenix. Its houses are mostly run of the mill suburban homes.