For me I think the fabulous stained glass is the most unique feature of this Cathedral.
There’s the Space Window which includes a fragment of lunar rock at its center, one is depicting major events of the life of Robert E. Lee, another tells about Stonewall Jackson, one for Charles Warren, one for Andrew Carnegie, one commemorating the Lewis and Clark expedition, and the raising of the American flag at Iwo Jima. Unique!
I hung around until it started to get dark because the girls choir was singing. It was ethereal in that ‘I’m in a movie’ kind of way. Those great cathedrals are certainly built for sound.