Yes it is hard to explain to those who have not seen it.
True story:
I was shopping for a new suit, and a young couple was buying a suit for an event. They asked me what I thought, and we got to talking. The young Asian woman said that they were going to Washington to the dedication of a monument she had designed.
Missed the opening, but I have seen it a half dozen time, once in the winter. As you say, an experience not to be forgotten. Impossible to photograph the feeling of being there.
But still anyone have photos to share, I have never taken any.
I spent 4 years in Vietnam, on two different tours. I was still in the US Army when the news came out that Maya Ying Lin's design had won out. Frankly, I was a little miffed. I didn't think it sounded like a really inspiring memorial to those who died there.
My last assignment was in the Washington, DC area. When I visited the wall myself, I understood.
To me, one of the more poignant depictions of the wall I have seen, was actually a painting. There is a man standing sort of leaning at the wall, with his hand flat on the wall, apparently at his son's name. Rather than the reflection of the surroundings one normally sees, there is a group of soldiers depicted as a reflection on the other side of the wall, who appear to be paused, but on a combat patrol. The soldier right at the front, has his hand up touching the hand of the man.
I have a brother-in-law how always said he wanted to see the wall, but just couldn't get around to it. I had a friend who was attending an Army school in this area, who told me he wanted to see it, but just couldn't get himself to do it yet. I offered to go with him, but indeed, he just wasn't ready yet.
Yes I went to it in DC way back. Very moving. No way to describe. Found my college roommate on the wall.
The Wall remains a very popular memorial. I haven't been there in 6 or 7 years myself. I guess I should go again sometime soon.