I WONDER - Where Is The Largest Cave In The World?

The video discusses the longest caves in the world, including Mammoth Cave in Kentucky, USA, which is over 650 kilometers long, Systema sack Actum in Mexico at 318 kilometers, and Jewel Cave in South Dakota, USA, at over 265 kilometers. It compares Mammoth Cave's length to Mount Everest, stating it would be about 75 times longer. The video also explains that caves can reach a maximum depth of about 3000 meters before collapsing due to rock pressure.

How much longer is Mammoth Cave compared to Mount Everest when laid beside it?

What happens to a cave when it reaches a depth of 3000 meters?