The City and County of San Francisco is the fourth most populous city in California and the 14th most populous city in the United States. San Francisco is a popular international tourist destination famous for its landmarks, including the Golden Gate Bridge, Alcatraz Island, the cable cars, Coit Tower, and Chinatown, its steep rolling hills, and its eclectic mix of Victorian and modern architecture. The city is also known for its diverse, cosmopolitan population, including large and long-established Asian American and LGBT communities.