The view to the northwest shows a corner of the now-defunct Junior Autopia, which would be replaced by both the Matterhorn and the Submarine Voyage attraction the following year. As one of three major new Tomorrowland attractions to open that year, the Matterhorn debuted on June 14, 1959. Built by coaster builder Arrow Development and WED Imagineering, it was the first tubular steel roller coaster in the world. It consisted of a wood and steel infrastructure surrounded by man-made rock. Starting with the 1961 holiday season, a revolving star stood atop the Matterhorn.