Photo: Frank Schulenburg, CC BY-SA 4.0 Free landmarks in San Francisco
Photo: Frank Schulenburg, CC BY-SA 4.0 
Photo: Rhododendrites, CC BY-SA 4.0 Palace of Fine Arts
Free, always
Photo: Daniel Lu (User:dllu), CC BY-SA 4.0 Ferry Building
Free, always
Photo: Christopher Michel, CC BY-SA 4.0 Lombard Street
Free, always
Photo: Ryan Schwark, CC0 Coit Tower
Free outside, paid inside
Photo: Beyond My Ken, CC BY-SA 4.0 Yerba Buena Gardens
Free, always
Photo: Frank Schulenburg, CC BY-SA 4.0 Wave Organ
Free, always
Photo: Chris6d, CC BY-SA 4.0 Pier 39 sea lions
Free, always
Photo: Lordsamp, CC BY-SA 4.0 Union Square
Free, always
Photo: Cmichel67, CC BY-SA 4.0 Fort Mason
Free, always
Photo: Supercarwaar, CC BY-SA 4.0