...Don't it always seem to go, that you don't know what you've got till it's gone. They paved paradise and put up a parking lot
So it's not the historic Pink Hotel in Hawaii that she mentions, but I felt it still applied... the once big field here used to be a spot you could see people flying kites, people playing with their pets, or I've even witnessed a nerf gun battle or two... is now part of the parking lot here.
Fun fact: When she was singing about the big yellow taxi in the song's final verse, Mitchell recounts the departure of her "old man" in the titular "big yellow taxi," which may refer to the old Metro Toronto Police patrol cars, which until 1986 were painted yellow.[7] In many covers the departed one may be interpreted as variously a boyfriend, a husband or a father. The literal interpretation is that he is walking out on the singer by taking a taxi; otherwise it is assumed he is being taken away by the authorities.
So the cache itself is a small magnetic tucked away in the no longer used bus stops. Should be easy to spot once you are at the right angle. Even a blind grab could turn up a find.