How an explorer stuck in a Kentucky cave for 17 days captured the world's attention
When Floyd Collins ventured into Sand Cave in Kentucky on Jan. 30, 1925, he was searching for the next big attraction. But he ...
National Geographic news11 年
Venture Deep Underground in This Breathtaking National Park
The surface of Mammoth Cave National Park encompasses about 80 square miles. No one knows how big the underside is. More than 365 miles of the five-level cave system have been mapped, and new ...
来自MSN1 年
Look beneath the surface to fully appreciate Kentucky's Mammoth Cave National Park
Mammoth Cave has been captivating imaginations for thousands of years. “Obviously, the geology is amazing. It's what (first) brought people here and what brings people back to study this region ...