This is the hardest, slowest way to dig a tunnel through a mountain. It would take you more than 80 years to dig a mile-long tunnel with hand tools!
Four thousand years ago, European miners extracted copper and other metals from rocky mountainsides with picks made from deer antlers. Ancient Romans carved miles of underground water supply channels called aqueducts using only stone chisels and wooden wedges. But they could only carve a couple of inches a day using these tools. Luckily, you don't have to pick at this mountain with deer antlers because there are more efficient tunnel-digging machines available today!