The world's largest open-pit mine, active 1895–present. Also one of Minnesota's National Historic Landmarks.
|Hull Rust Mine from viewing overlook|
The mine was added to the National Register November 13, 1966.¹
¹ Hull-Rust-Mahoning Mine : National Register of Historic Places : mnhs.org. (n.d.). Retrieved February 26, 2014, from http://nrhp.mnhs.org/property_overview.cfm?propertyID=2