The largest open pit mine in the world, by surface area, is the Bingham Canyon Mine in Utah, USA.

Here are some key facts:

* Surface Area: Approximately 7.6 square miles (19.7 square kilometers)

* Depth: Over 0.75 miles (1.2 kilometers) deep

* Mineral Extracted: Primarily copper, but also gold, silver, and molybdenum

* Operator: Rio Tinto Group

It's worth noting that the title of "largest" can be subjective, depending on what criteria you use. For example, some people might argue that the Chuquicamata copper mine in Chile is larger by volume of material extracted, even though it has a smaller surface area.