Mount Liang by Ciro Santilli 34 Updated +Created
The term "Mount Liang" generally refers to both the mountain and the surrounding marshy areas.
The novel always uses the term "梁山泊' (liang2 shan1 po1) to refer to the place.
Video 1.
How did the Liangshan ponds form? by CCTV (2019)
Source. Chinese only, but still fun to see the real place.