Cerro Bolívar is a mountain in the state of Bolívar, Venezuela, about 600 metres high. It has been described as "the richest concentration of iron ore on the face of the earth." At the time of its discovery it promised to outdo the great Hull-Rust-Mahoning mine in Hibbing, Minnesota, USA. More than half the mountain is thought to consist of top-grade iron ore – anything up to half a billion tons.