Hull–Rust–Mahoning Open Pit Iron Mine

The Hull-Rust-Mahoning Mine in Hibbing, Minnesota, United States, is one of the largest open pit iron mines in the world, with a 1.5 by 3.5 mile footprint and depths up to 600 feet. The mine, located in the Mesabi Range, supplied as much as one-fourth of all the iron ore mined in the United States during its peak production during World War I and World War II.