If you're looking for the deepest hole, it's the Kola Superdeep Borehole, which reaches a depth of 12,262 meters (40,230 feet). It's located in the Kola Peninsula in Russia, and was drilled for scientific research.

If you're looking for the largest hole by volume, it's probably the Bingham Canyon Mine in Utah, USA. It's a massive open-pit copper mine, covering an area of 7.7 square kilometers (3 square miles) and reaching a depth of 1,200 meters (3,900 feet).

Other notable contenders for "biggest hole" include:

* The Mirny Diamond Mine in Siberia, Russia, which is a 525-meter (1,722-foot) deep open-pit mine with a diameter of 1,200 meters (3,900 feet).

* The Diavik Diamond Mine in Canada, which is an open-pit mine located on an island in a lake. It's not as deep as some of the others, but its location on an island makes it seem like a massive hole in the earth.

* The Great Blue Hole in Belize, which is a 124-meter (407-foot) deep sinkhole that is a popular scuba diving destination.

It's important to note that the definition of "biggest hole" is subjective and can vary depending on your criteria. The Kola Superdeep Borehole is the deepest, Bingham Canyon Mine is the largest by volume, and other mines and sinkholes are also worthy contenders.