Description
Pennsylvania PA postcard Crystal Cave Kutztown Tichnor Vintage. “Prairie Dogs – Crystal Cave, PA,” showing one of the cave’s unique underground rock formations. Located between Reading and Allentown along the William Penn Highway, Crystal Cave has long been a favorite natural attraction in Pennsylvania. Original postcard titled “Prairie Dogs – Crystal Cave, PA,” showing one of the cave’s unique underground rock formations. Located between Reading and Allentown along the William Penn Highway, Crystal Cave has long been a favorite natural attraction in Pennsylvania.