Murals! where? everywhere! walls, streets, signs, windows. keep your eyes peeled. I walk a lot in San Francisco and always seem to find new murals in the least expected places. They are a constant source of inspiration, and make me wish I could paint worth a damn.
You have a lot of hills to choose from in San Francisco but in my opinion the best (and most varied) views are from Bernal Hill. Bonus: from my kitchen table I can watch tiny blobs moving around on this hill-- slow blobs are people, fast blobs are dogs.
I fell in love with San Francisco at first site, the buildings and the light, so much grooviness to dig. The signature building style I call "Wonkatecture" -a kaleidoscopic hodgepodge of giddy pioneer freedom and gilded age excess. It's a modernists nightmare! A prime example is The Vedanta Society HQ, built in 1903 to house a religious sect which fostered a multifold path to God and reflected its openness architecturally. More more more.
Here is another place packed with visual stimuli, along with weird smells and busy sidewalks. I love roaming through all the shops, venturing deep down the aisles to hunting for all things odd and unknown. So much to see, I wish I had extra eyes!