A picture is worth a thousand words - these are impressively big holes. Is there room for more holes this size elsewhere - sure there is. The earth is a big place.
The scale can only really be appreciated in the shots that include tiny houses and trucks.
10 Most Incredible Earth Scars [Environmental graffiti]
The best commentary:
The size of the hole is such that wind currents inside cause a downdraft that has resulted in helicopters being sucked in and crashing. Good to know the area above it is now a no-fly zone.