In the tumultuous history of San Francisco, two iconic spots still remain in the hearts of older generations and hold the imagination of those who never got to see for themselves. This week, a double feature of documentaries explores these two lost treasures of the city, and celebrates their legacy. ‘Remembering Playland at the Beach’ (2010) and ‘The Cliff House and Sutro Heights’ (2013) each look at the respective landmarks of SF lost to time and development. Filmmakers will be on hand for a Q&A after the screening. The two films play back-to-back on Sunday, Aug. 31, at Sebastiani Theatre, 476 First St., Sonoma. Noon. $10. 707.996.9756.