Indian Echo Caverns is an historic show cave in Derry Township, Dauphin County near Hershey and Hummelstown, Pennsylvania in the United States. The caverns were mentioned in an article by the Philadelphia Philosophical Society as early as the 1700s. The limestone cave tourist destination has been considered "a living cave" because its formations continue to grow. It is open for the public to visit daily via guided tour, except for Thanksgiving, Christmas and New Year's Day. Hours vary by season, and admission rates vary by age. Background Given the large and accessible natural openings, these caverns were likely utilized for storage and shelter by the Susquehannock people who camped nearby prior to the 1700s. The caverns also bear graffiti marks that were made by early American explorers who visited the system during the beginning of the nineteenth century. For nineteen years (1802–1821) the caverns were the home of William Wilson, who was also known as the "Pennsylvania Hermit." Wilson withdrew from society after his failure to halt the execution of his sister Elizabeth for the murder of her twin sons. Following her death in Chester, Pennsylvania in 1786, William wandered westward across southeastern Pennsylvania, settling in the caverns in 1802. The Sweets of Solitude: Instructions to Mankind How They May Be Happy in a Miserable World, an essay reportedly written by Wilson during his time in the caverns, was published following his death. During the early 1900s, the caverns became a popular exploration site for area Boy Scout troops. Sometime around 1919, a box labeled "diamonds in the rough" which contained coins dating to 488 B.C. and 1288, as well as coins from Argentina, Austria, Brazil, Egypt, England, France, Greece, Guatemala, and Italy, was found by Hummelstown resident Russell S. Zeiters while he and four of his boyhood friends were exploring the caves. The box also contained a gold-mounted aluminum cameo inscribed with "My Mother," a dozen moonstones, additional pieces of jewelry, and a bottle of alumninum paint powder. Experts at the State Museum of Pennsylvania subsequently examined the box and its contents and verified the ages of several of the coins it contained. Previously known as Wilson Cave, Hummelstown Cave, Stoverdale Cave, Giant's Cave, and Indian Cave, this system of caverns was renamed Indian Echo Cave when it was outfitted with electrical lighting, walkways and safety railings, and was located on the old Brehm farm roughly one mile from