Though this kinetic creation has been making the rounds on the internet for the past couple years, there are finally good photographs and videos available online! Built over the course of 35 years using over 100,000 toothpicks, notable landmarks from throughout the city of San Francisco are included in the sculpture.
See a really good set of photos on the Tinkering Studio's flickr page. LINK
Or watch a video of the multiple balls rolling through the sculpture. LINK