Humongous holes can be found scattered across the globe. Some are made by nature like craters or
collapsed cave systems, while others are brought about by mankind. Massive man-made holes scar the Earth with greedy pockmarks indicating natural resources being stripped from the land. A few of these holes are so huge that they can be seen by astronauts with the unaided eye. Still others signal a subterranean fire, open pit diamond mines, and sinkholes. Other holes are a geological phenomena. Here are some of the most massive man-made and natural holes to be found on our planet.