Hole number 3....
3. Bingham Canyon Mine, Utah
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_1bu8bimaji2Z76oOHTmUgabxaQ-der_ijzQKf0NbyLZSKNq2rtAaIdd8K1BAOFZyOzaO4KUoyr6G8iJ82ys-5BK_rfN4z1vk_9ZkNmVFnSNFsk4zQyUQtfIk31SAHBCApdWBbZj_OzQ/s320/download.jpg)
This is supposedly the largest man-made excavation on earth. Extraction began in 1863 and still continues today, the pit increasing in size constantly. In its current state the hole is ¾ miles deep and 2.5 miles wide.
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