TAKE A TRIP INTO YESTER-YEAR!Walk through the historic schoolhouse that is home to a great collection of truly Keystone history! Listed below are just some of the collections ~  We're sure you'll have a great experience as you wander through the hallways and classrooms of days gone by.• Gutzon Borglum (Sculptor), & the Carvers of Mount Rushmore• Wild Horse Harry Hardin & Sugar Babe• Peter Norbeck & Iron Mountain Road• CC Gideon & the Pigtail Bridges• Discovery of GOLD in Battle Creek• Keystone’s Hard-rock Gold Miners• Town of Keystone Founders• The Black Hills Gold Rush & Tin Boom!Keystone, South Dakota is also known as the home to Carrie Ingalls Swanzey. Yes, this is the Carrie Ingalls from Little House on the Prairie. Carrie was a newspaperwoman in and around Keystone. She married a local widower by the name of David Swanzey, raised his children and made their home here.The museum has artifacts from the Ingalls family,including Ma Ingalls' China Shepherdess.