Now each year, as new snow lands on the glacier, it melts in the summer sun, and it forms little rivers of water on the flow along the ice, and they start to melt and bore their way down through the glacier, forming big networks of caves, sometimes going all the way down to the underlying bedrock.
Tiap tahun, ketika salju baru mendarat di atas gletser, ia meleleh karena mentari musim panas, dan membentuk sungai kecil di sepanjang lapisan es tersebut, dan lapisan es pun meleleh dan menembus gletser ke bawah, membentuk jejaring besar gua-gua, kadang begitu dalam ke bawah sampai ke batuan dasar.