Whether you like to chow your cheeseburgers in a fancy restaurant or a no-fuss regional chain, there are countless variations available in every corner of the US, from In-N-Out’s simple but iconic cheeseburger to the famed gourmet version at Chicago bistro Au Cheval that has diners lining out the door. For fast food pilgrims in search of history, 80/20 at Kaelin's opened in 2018 on the site of the original Kaelin's Restaurant in Louisville, Kentucky, and has gained a following for its perfectly made cheeseburgers.

Now discover America’s most historic fast food restaurants

Last updated by Lottie Woodrow.

America's original recipe burgers and where to try them