After exploring various shopping destinations in Los Angeles, I've discovered that the South Coast Plaza in Costa Mesa is the biggest mall. It's not just the largest in LA but also the whole of California, with a retail space of 2.8 million square feet. This mall is home to high-end stores like Gucci, Chanel, and Versace, to name a few. It also houses various restaurants and a theater. It's definitely a one-stop-shop for all your luxury shopping needs.