Tags: Cave.
Indian Echo Caverns is a show cave in Derry Township (Dauphin County) near Hummelstown Pennsylvania in the United States. The limestone caves are open for the public to visit via guided tour.The entrance to the caverns used by modern visitors is located in a bluff along the Swatara Creek. A second entrance was sealed for security purposes when the caverns were commercialized in the late 1920s.
