Earlier this year a team of spelunkers, about five hours from the entrance of Jewel Cave crawled their way into what’s being called the most significant find of the last decade.

The explorers pushing the south western edge of Jewel came across a series of huge previously undiscovered corridors. Some of the new cave passageways reach more than five stories high, 15 feet wide, and over a hundred feet long, and they keep going.

SDPB’s Charles Michael Ray spoke with some of the explorers who are planning a return trip later this week.