This tree absolutely does not grow into this shape naturally. Look at the trees in the background. It’s a lovely niwaki. The style is to shape the tree to mimic natural phenomena, which this does well, but it’s been shaped with artistic intent. This long, arched style is common for framing doorways.

Ah yes, a new picture every MSHA refresher. No visibility on a haul truck when you have to climb a staircase to get into the cab.