Also known as the "Queer Smithsonian," the GLBT History Museum is the first stand-alone museum to celebrate and document the evolution of the modern queer experience. Exhibits cover 100 years of San Francisco's gay history, with subjects like the  assassination of Supervisor Harvey Milk, SF's queer Asian Pacific Islander community, and The Daughters of Bilitis, a 1950s lesbian social club. Tickets are $5, and the first Wed of every month is free.