The In-N-Out Burger at 9149 S. Sepulveda Blvd. in Los Angeles leads this list thanks to an enormous Google review footprint: about 21.7K reviews with a 4.6 rating. Reviewers consistently praise the fresh burgers, quick service, clean setting, and fair prices, but this location has an extra hook: diners can watch planes descend into LAX while eating. Many positive reviews frame it as a must-do California stop, especially for first-time visitors chasing the classic Double-Double, fries, shakes, and “Animal Style” experience. Expect crowds, but the energy is part of the appeal.