Simandou is a mountain range located in southeastern Guinea, known for its rich deposits of iron ore. It is one of the largest untapped iron ore reserves in the world, with an estimated 2.25 billion tons of high-grade ore. The region has attracted significant interest from mining companies due to its potential for large-scale production. The development of Simandou has faced various challenges, including political issues, infrastructure needs, and environmental concerns. The project involves constructing a railway and port facilities to transport the iron ore to international markets, which could significantly impact Guinea's economy and development.