- Sishen city is a city located in the Northern Cape province of South Africa. It is situated near the town of Kathu and is mainly known for its iron ore mine, which is one of the largest open-pit mines in the world. The mine, operated by Kumba Iron Ore, is a significant source of employment and economic development in the area. Sishen city also serves as a residential area for the mine's employees and has various amenities and facilities, including schools, hospitals, and shopping centers. The city experiences a semi-arid climate, with hot summers and cold winters.