Bathed in Rocky Mountain sunshine, the sweeping adobe-style Thundergod House frames the entrance to Cheyenne Mountain Zoo in Colorado Springs — ponderosa pines soaring overhead and a candy-blue sky completing the scene in saturated mid-century chrome color. The sender, Rose, dashed off an energetic note to Viola in Amarillo, Texas, breathlessly cataloguing her September 1956 road trip: arriving at 11 a.m. Saturday, attending church, driving out to Cripple Creek where the aspens blazed yellow and pink, touring the zoo, and picking up "a bushel of peaches" before heading to Denver on Saturday. It's a vivid slice of postwar American leisure travel — the kind of unhurried, meandering family road trip that defined the Eisenhower era. The Cheyenne Mountain Zoo, the only mountain zoo in the United States, perches at 6,800 feet elevation, and the Thundergod House was a distinctive landmark at its entrance. The 2-cent Jefferson stamp (Scott #1033) is a common but cleanly cancelled example from the definitive Liberty series.