Harry and Esther Snyder opened the first In-N-Out Burger in 1948. They chose a small, drive-thru only space in Baldwin Park, CA, a suburb of Los Angeles, CA. The Snyders chose the busy intersection of Interstate 10 and Francisquito Avenue for their venture. There, they served burgers from their tiny location. Little did they know, their small restaurant would blossom into a cult following of burgers, fries, and shakes. Scroll down to learn more about the Snyders' creation.

In-N-Out was the first hamburger stand in California to feature a speaker system. The system consisted of a two-way speaker box, which allowed customers to stay in their vehicles while ordering. Even after almost seven decades in existence, the In-N-Out menu remains small. Patrons can order a hamburger, a cheeseburger, or a Double-Double. The Double-Double, In-N-Out's signature burger, consists of two patties of meat with cheese slices in between. In-N-Out also touts their fresh, never frozen french fries and their in-house made milkshakes.

In 1954, In-N-Out updated their logo to feature an arrow. The current logo remains today. Each restaurant carries the red and yellow paint scheme throughout each store, inside and out. Each restaurant also has two palm trees outside each entrance, crossing in an "X" pattern. The restaurant's motto, "Quality you can taste," can be found in yellow neon lighting next to each interior menu.

The first "animal style" burger was served in 1961. Animal style consists of a mustard-cooked patty, pickle, extra spread, and onions. Today, In-N-Out features many items on their "secret" menu. Animal style fries are also served. Animal style fries consist of cheese, grilled onions, and In-N-Out's secret spread topped on fries. There are many more items on the restaurant's secret menu, from a bread-less burger to a sandwich stacked four patties high.

In-N-Out first expanded outside of California in 1992 when they opened their first store in Nevada. Now, in addition, they have stores in Arizona, Oregon, Texas, and Utah. Additionally, In-N-Out opened a pop-up location in London for a day in the fall of 2016. Food sold out from the London location sold out in an hour. Owing to its roots, California still has the most In-N-Out locations in the United States.

In-N-Out's motto, "Quality you can taste," is featured inside every one of the chain's locations. In addition, several Bible verses can be found on much of the restaurant's packaging, from burger wrappers to the undersides of drink cups. Their french fry containers feature a paragraph touting their fresh, never frozen practices. As far as media is concerned, their jingle, "That's What A Hamburger's All About" can be heard in their radio advertisements and TV commercials. The restaurant doesn't rely too much on TV though -- bumper stickers and word of mouth keep the brand relevant.