You won't have to dig too far down to learn about the area's mining history. Check out Felipe dos Santos Mine for some insight into the resources that were excavated here.
Felipe dos Santos Mine is a great place kick off your day in Ouro Preto. This inactive mine site is recommended by fellow travelers, but it isn't the only thing to do here. Allow some time for other sights like Mina da Passagem, Tiradentes Square and Itacolomi State Park to really experience what's on offer in the area.