The Roller Coaster-the Cyclone at Coney Island, the Racer at Pittsburgh's Kenywood Park, the Blue Streak at Sandusky's Cedar Point-icon of the midway, capable of reducing even the strongest of grown men to screaming, white-knuckled hysterics. During the early decades of the 20th century, daring designers pushed the limits of these high-speed thrillers, reaching hundreds of feet in height and thousands of feet in length, with ever more miles of winding, twisting, lurching track dominating the landscapes of America's amusement parks. Most of the roller coasters from that golden age are gone today. Thankfully, they live on in memory, preserved in vintage postcards that provide a lasting record of the magnificent wooden structures that thrilled our parents, grandparents, and great-grandparents.