This family have been carving 'Crazy Horse' for eight decades

The Crazy Horse Memorial has been under construction since 1948 and could one day become the world's largest mountain carving.

The monument honours Crazy Horse, the Native American warrior who helped defeat the US Army at the Battle of the Little Bighorn in 1876, and was commissioned by Lakota Chief Henry Standing Bear.

(Photo: Crazy Horse Memorial, Credit: Crazy Horse Memorial Foundation)