Exploring This Underground Cave Is A Tight Squeeze

Nico Mathieux isn't one to shy away from an adventure. This time, he and his buddy are in the French Alps where they found a hole in the ground so, naturally, they decided to repel down into it. As they travel deeper, they're met with some seriously narrow crevices that they squeeze themselves through. They ended up finding an underground cave system so awesome, they spent eight hours exploring it.

You can check out the full video here.