Out of curiosity, what other places have you visited that you’re comparing it to?
South Korea: Climbing Hallasan volcano on Jeju Island. Really neat.
China: Exploring Suzhou/Hangzhou old towns. Suzhou is like the Venice of China.
All these places warrant a trip in and of themselves; but they didn’t feel holy to me if that makes any sense. Imperial Gardens felt different, like one thread of contiguous history, unrent by tragedy and upheaval, touching you on the face.
Anyway, for me, the wall itself didn't evoke anything. I think there was just too much commotion with everyone doing mostly their own thing. I did enjoy watching everyone else experiencing the place, though.
If nothing else, there's a few thousand years of history there to see.