
1-Day 816 Project & Wuling Mountain Grand Rift: Underground City & Canyon Adventure
816 Underground Nuclear Project → Wuling Mountain Grand Rift Scenic Area
THE LOCAL DIFFERENCE
Enter the world's largest man-made cave complex—20 kilometers of tunnels, hidden chambers, and a frozen Cold War history that remained classified for decades.
Caves within caves, buildings within buildings—this subterranean maze tells the story of 60,000 builders who vanished into the mountain for 17 years.






