It was once a summer resort to rival any other, where stressed city dwellers found relief from heat and congestion. Today, the Catskills' vistas still inspire, and grand destinations like the Mohonk Mountain House are reminders of the area's glory days. Tonight, in a Chronicle classic from 2003, we uncover the region's forgotten Hollywood link, get too close for comfort to a restless rattlesnake, and tour the great estates left behind by the rich and famous.