The sharp "shoo-fly" curve in the highway follows the original rail bed. The railroad was constructing a tunnel (#7 on the line) through the outcropping hill to create a straight route, when one morning it caved in. Fortunately, no one was hurt (stories of Chinese rail workers dying are pure myth). The chief designer said the tunnel would soon be reinforced, but the hillside proved too unstable. The sharp turns were laid to meet the contract completion schedule, and remain to this day.