The "Miami Rock Buoy" at the top of this map (click on it) is the islet Robert Smithson intended his Island of Broken Glass be executed on, before being thwarted by hippies. It would have been visible from Yellow Point, just off the top left hand corner of the map and about 10km south of where I am. Being so visible--a little viewing height is easily gained on Vancouver Island, not to mention ferry traffic!--it would certainly have been better known than the Spiral Jetty, a true Island tourist attraction--until about five years ago there was a "glass castle" on the highway. too. The glass on Smithson's island would have smoothed out a lot by now, but when the light hit it... The excellent catalogue for the Vancouver/Smithson show (where I found out the location) tells the whole story. this is my 2000th post!