West Hollywood is a city in Los Angeles County, California, United States. Incorporated in 1984, it is home to the Sunset Strip. As of the 2010 U.S. Census, its population was 34,399. It is considered one of the most prominent gay villages in the United States.

Beverly Hills is a city in Los Angeles County, California. Located within 5.71 square miles (14.8 km2) and surrounded by the cities of Los Angeles and West Hollywood, it had a population of 34,109 at the 2010 census and an estimated population of 33,792 in 2019.The city is home to many celebrities, luxury hotels, and the Rodeo Drive shopping district. Originally a Mexican ranch where lima beans were grown, Beverly Hills was incorporated in 1914 by a group of investors who had failed to find oil, but found water instead and eventually decided to develop it into a town.

Santa Monica (Spanish for 'Saint Monica') is a beachfront city in western Los Angeles County, California, United States. Situated on Santa Monica Bay, it is bordered on five sides by different neighborhoods of the city of Los Angeles: Pacific Palisades to the north, Brentwood on the northeast, West Los Angeles on the east, Mar Vista on the southeast, and Venice on the south. The 2010 U.S. Census population was 89,736. Due to a favorable climate and close proximity to Los Angeles, Santa Monica became a famed resort town by the early 20th century attracting many celebrities, like Marion Davies, to build magnificent beach front homes on Pacific Coast Highway (PCH). The city has experienced a boom since the late 1980s through the revitalization of its downtown core, significant job growth and increased tourism. Popular tourists sites include Pacific Park on the Santa Monica Pier and Palisades Park atop a bluff over the Pacific Ocean. Like other coastal beach communities, coastal erosion due to coastal infrastructure and high human usage is an increasing challenge, and will become worse due to sea level rise. Santa Monica has a history of developing environmental and sustainability strategies, with the most recent focus on community-wide carbon neutrality by 2050 or sooner.

Pasadena () is a city in Los Angeles County, California, 11 miles (18 km) northeast of downtown Los Angeles. It is the most populous city and the primary cultural center of the San Gabriel Valley. With its substantial downtown area, observers consider it as either a suburb of nearby Los Angeles, or as a significant urban center in its own right.Its population was 137,122 at the 2010 census and an estimated 141,029 in 2019, making it the 41st largest city in California and the ninth-largest city in Los Angeles County. Pasadena was incorporated on June 19, 1886, becoming one of the first cities to be incorporated in what is now Los Angeles County, following the city of Los Angeles (April 4, 1850).Pasadena is known for hosting the annual Rose Bowl football game and Tournament of Roses Parade. It is also home to many scientific, educational, and cultural institutions, including Caltech, Pasadena City College, Fuller Theological Seminary, ArtCenter College of Design, the Pasadena Playhouse, the Ambassador Auditorium, the Norton Simon Museum, and the USC Pacific Asia Museum, with the Jet Propulsion Laboratory in nearby La Cañada Flintridge.