Hollis Johnson/Business Insider.
I tried the biggest burgers at McDonald's, Wendy's, Burger King, In-N-Out, and Shake Shack.Erin McDowell/Insider; NYC Russ/Shutterstock; Savvapanf Photo/Shutterstock; rafapress/Shutterstock.
Wendy's, the third-largest fast-food burger chain in the US, opened its doors in 1969.dcwcreations/Shutterstock.
I tried every breakfast sandwich I could order from my local Burger King locations.Savanna Swain-Wilson.
One of my favorite fast-food orders is a Double-Double animal style at In-N-Out.Erin McDowell/Insider.
I recently went to Raising Cane's for the first time and realized why it's such a popular fast-food chain.Erin McDowell/Insider.
I tried every kind of fries at In-N-Out and liked the animal-style fries the best.Erin McDowell/Insider.
I recently went to In-N-Out for the first time and realized why it's such a popular fast-food chain.Erin McDowell/Insider.
Bacon burgers from Wendy's and Burger King.Erin McDowell/Insider.