Some are brisket ones with American cheese and onions.

Some are beef-and-lamb ones with horseradish aioli and sharp cheddar.

Others still are double ones with chorizo, eggs and guacamole.

But all of them are burgers.

Burgers that are worth exploring in much further detail via this aptly monikered slideshow called the State of San Francisco Burgers.

Correction: this slideshow.