Sutro Baths
Sutro baths are the old remains of at one point the largest swimming pools in the US. It almost looks like ancient ruins, right along the water. Take the 38 from Arguello and Geary outbound to the very end. Then, after you see the baths, take an easy, beautiful hike along Lands End (approx. 2 miles; highlighted in red) around the perimeter of the city. You will have spectacular views of the ocean and Golden Gate Bridge (if there’s no fog, that is!).
Then you can take the green-highlighted trail to the Legion of Honor museum, a popular art museum, with lots of Rodin sculptures, including “The Thinker”. The parking lot has a beautiful view of the city, and the Holocaust Memorial is right there, too. You can then take the 18 bus from the Legion of Honor to the 38 bus, or just walk to Geary and hop on the 38 from there.