Almost every city I've lived in had one landmark restaurant; a joint that is a must-see by tourists and out-of-town visitors. You know - the place the stranger sitting next to you at a blackjack table in Vegas mentions when you bring up your hometown. Trademark restaurants may not be the best, but they are the best known. IMHO, landmark restaurants include:
Buffalo, New York: The Anchor Bar - birthplace of the chicken wing.
What do locals think is better: Duff's, Gabriel's Gate
Las Cruces, New Mexico: La Posta - supposedly one of the best Mexican restaurant in the US.
What do locals think is better: Chope's, Nellie's.
Denver, Colorado: Buckhorn Exchange - steakhouse that's been around forever.
What do locals think is better: Emil-Lene's, Brooks, Denver Chophouse..
Cleveland, Ohio: Corky and Lenny's - one of the biggest delis in the Great Lakes region; known by hundreds of thousands in the Jewish community
What do locals think is better: Jack's Deli; Slyman's.
What's your city's landmark restaurant, the place everyone knows about, even those thousands of miles from home?