- View of United States' largest working Windmill Sponsored by Marion County Bank Pella Chamber of Commerce / Convention & Visitors Bureau 518 Franklin Street Pella, Iowa 50219 Telephone: 641-628-2626 or 888-746-3882 Fax: 641-628-9697 email: David Vollmar, Executive Director Karen Eischen, CVB Director or Ginger Marcinkowski, Positively Pella Director Home | Points of Interest & Recreation | ...www.pella.org