I should have said the
tip of the SF peninsula....I've not thought of areas further south towards San jose as a 'peninsula', although technically they very much are too. I've always labeled the SF 'peninsula' as the small area shown below...or the legal govt boundaries of the city of SF itself.
qph.cf2
I consider the SF
region as definitely extending all the way south to San Jose....I just realize that's the distance from central LA to southern Orange County around Irvine. For some reason I thought SF's south bay was closer than that. As for NYC, both city & region, most of its tourist friendly sites or points of major interest are located in Manhattan, which is comparatively compact compared with what I consider as 'Los Angeles'. But everyone has different ways of labeling what a city is or isn't. Or a region is or isn't.
Things like this make 'LA' its own animal. Or, for better or worse, sui generis.
https://youtu.be/SL0ucb70Qlo.