tyler florence: we're here at hang ah. it survived 101 years of war, bubbles and bursts in the economy in san francisco. this place is just amazing. and the food is fantastic. first course, gentlemen they're legendary barbecue pork bun. oh, look at that. tyler florence: isn't it great? he's in ecstasy. oh. johnny devenanzio: dad, did you eat the entire thing? i did. he did. johnny devenanzio (voiceover): originally formed as a haven for chinese immigrants during the california gold rush, chinatown is a leader in defining chinese-american cuisine and is even the birthplace of the fortune cookie. walking down the streets of food stalls and street vendors, it's clear why this place shines as one of san francisco's most popular attractions. johnny devenanzio: wow. tyler florence: that's one of the most delicious pastries. i've been all over the world. this is remarkable. it's an american treasure, this place. we just took a time machine and moved to italy. tyler florence: this is north beach. it's the heart and soul of the ita