Explore Los Angeles’ best beaches, museums, fun landmarks and vibrant neighborhoods for the ultimate California adventure. Discover the best activities and attractions in LA. From iconic landmarks to hidden gems — the ultimate guide to experiencing Los Angeles. Los Angeles, also known as L.A., [b] is the most populous city in the U.S. state of California, and the commercial, financial, and cultural center of Southern California. What does the abbreviation LOS stand for? Meaning: line of scrimmage. Los Angeles, city, seat of Los Angeles county, southern California, U.S. It is the second most populous city and metropolitan area in the U.S. Home of the American entertainment industry, the city is also known for its pleasant weather, urban sprawl, traffic, beaches, and ethnic and racial diversity. Here's your guide to places to visit in L.A., from star-spotting on Rodeo Drive to museum-hopping at the Getty & LACMA. The official guide for things to do in Los Angeles County. New attractions, free things to do, fun activities for the family and more.