San Francisco is a popular international tourist destination renowned for its beauty, cosmopolitan flair, steep rolling hills, and eclectic mix of Victorian and modern architecture. The city is surrounded by water on three sides and has many famous landmarks, such as the Golden Gate Bridge, Alcatraz Island, Palace of Fine Arts, the cable cars and streetcars, Coit Tower, and Chinatown. The city is well known for its left-wing politics and its diverse population, including large and long-established Asian American and LGBT communities. It is the most densely populated major city in California and is the second most densely populated major city in the United States, only after New York City. It is also the only consolidated city-county in the state of California. San Francisco is also home to the largest social media, technology, and biotech industries in the world. The city is also ranked the most expensive city in the United States and stands third in the world. It is home to California’s second tallest building, the Salesforce Tower, standing at 1,070 feet tall.