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.
Located near to the Alamo square's Painted Ladies is this wonderful gothic "stick" Italian villa with a long weirde history. Built by a Candy Baron in 1889, it's housed variously; a Russian Czarist nightclub, Jazz musicians, Satanists, a Manson family member, and one of the first 60's Hippy communes -Calliope. Creepy as hell enshrouded in fog after dark.
Some areas of San Francisco are so steep that the sidewalk literally is a stairway; other times it’s just more interesting to have a stairway between streets… or a slide. I once saw a grown man with a briefcase matter-of-factly go down this slide and continue on his way down the hill. Why not?