The burgers on this list are stacked sky-high, piled with sauces, toppings, and multiple patties. Check out the 10 largest burgers to buy from fast food chains.

The folks at Love Food have a feature out, published on July 11, that ranks the best fast food burger chains in America.

Celebrate National Burger Day with Yelp's top 25 burger chains. From In-N-Out to Five Guys, discover the best burger spots across the U.S. based on reviews.

Click through the above slideshow to meet the 50 biggest restaurant chains in America by U.S. systemwide sales, and check back throughout the summer as we introduce the full Top 500. Click here to ...