Documentary
Why is a small region of China home to an extraordinary number of giant holes containing vast, little explored subterranean forests? One professor is on a dangerous mission to find out.
1
Male
Acting
8.0
Movie
2025
6.6
2014
6.9
2003
7.6
2023
6.8
7.0
2009
6.2
2002
7.2
2010
7.1
2013
1971
6.4
2026
7.3
2018
