Input (grade 13): The Palm Springs Aerial Tramway, considered to be one of the greatest engineering feats of the 20th Century, takes visitors from the valley floor to the San Jacinto Peak mountain station 8516 feet (2595 m) above sea level.
Output (grade 7): One of the world's greatest engineering feats is in Palm Springs. The Palm Springs Aerial Tramway brings visitors from the floor of the valley to the top of Mount San Jacinto, 8516 feet (3000 metres) up!