tonight's good question, what are those strange-looking die a ram as in the rockwall near coit tower. >>> millsions of people visit the coit tower but many will never see this part of it. >> this looks like candles. candles and some rocks. >> there is a walkway near coit tower and on that walkway is a rockwall and in the nooks and koreanies and yes vasts of that rockwall are a series of small die a ram as somebody has carefully built. >> i have never seen anyone photograph them, i have never seen any of the artisans come in and do their magic, create their art, but it's a great addition to the neighborhood. >> there are four die ram as in the wall all covered with a plexi-glass shield. all quirky in their own way. nobody knows how they get there except the gardener. >> they are kind of mysterious and i have seen the artist come and kind of be touching up touching up with paint. the artist is a mysterious young woman, shows up, tries to blend in and not be noticed. >> she looks kind of together and she, i didn't talk to her or anything. >> her guerilla artwork is doing all the talking