The Avenue Tiled Steps, perhaps the world's longest steps, high), was conceived and fabricated by Irish ceramicist Aileen Barr and San Francisco mosaic artist Colette Crutcher. San Francisco's Tiled Steps - World's Longest Mosaic (USA) -
Gorgeous Mosaic Staircase in San Francisco by Martin Taylor. The Avenue Tiled Steps project has been a neighborhood effort to create a beautiful mosaic running up the risers of the 163 steps located at and Moraga in San Francisco.
Avenue Mosaic Steps in San Fransisco, The Sunset. A staircase designed by local artists and put together by more than 300 people from the neighborhood, these mosaic steps (right by Grand View Park) took two years (and lots of hallucinogens) to decorate.