Pylons - Strange colored crystals seen on the sci-fi series THE LAND OF THE LOST/NBC/1974-77. The Pylons located in pyramid-like triangles, controlled doorways through time (when moved in the proper sequence). It was through one of these doorways that forest ranger Rick Marshall (Spencer Milligan) and his children, Will (Wesley Eure) and Holly (Kathy Coleman) fell through while rafting down the Colorado River. Now trapped in a strange prehistoric landscape of dinosaurs and monkey people ranger Rick sought to uncover the secret of the crystal pylons and find a way home to his own time and dimension. On the revised version of the series LAND OF THE LOST/ABC/1991-94