Landscapes & nature
Shiratani Unsui Gorge
Cedar forest on Yakushima Island
Shiratani Unsui Gorge is a real place Princess Mononoke was drawn from, named as a model for the setting in its Japanese Wikipedia article. Nothing was filmed here and no story happens here.

Drawn from this place
Japanese Wikipedia says the setting of these anime was modelled on Shiratani Unsui Gorge. Nothing was filmed here.
Princess MononokeWar anime1997