There’s a huge problem on the Antarctic and it’s one that could have global consequences.

Scientists have discovered a gigantic subterranean hole underneath the world’s most important glacier. This sparked concern it’s melting faster than anyone realized.

The cavity under the glacier in West Antarctica stretches six miles long and 1,000 feet deep.

To put that into perspective — it’s about 14 billion tons of melted ice — and about two-thirds the size of Manhattan in New York.

It also could mean rising sea levels globally — which pose a serious threat to coastal cities around the world.

One researcher said the size of a “cavity under a glacier plays an important role in melting. As more heat and water get under the glacier, it melts faster.”

Researchers conducting the study said the cavity is growing at an “explosive” rate which took them by surprise.