Behind Hogback Hill lies Wildcat Hollow, one of the many productive fields of the early oil era. According to tradition, a speculator drilling in this narrow valley shot a wildcat, had it stuffed, and set it atop his derrick, and the mounted cat gave the hollow its name. Because the area was largely untested and somewhat away from the Oil Creek flats, the term wildcatter was coined for a person who risked drilling in unproven territory. Many wells in the hollow had imaginative names: the Yankee Well flowed on a cycle of seven minutes on and 20 minutes off, the Sunday Well refused to flow on weekdays, and Titusville millionaire George K. Anderson named four of his wells the Swamp Angel Wells after the nickname of a large piece of military hardware used before the Civil War. Along with the wells came refineries, boarding houses, and a few homes, and a fine dance hall on top of Hogback Hill survived until after World War II. Today Wildcat Hollow serves as an environmental and historical study area with trails and teaching stations for public and school use.