The most beautiful sunset I've ever been blessed to have witnessed was in the mid to late 90's, on the University of Minnesota campus.

The clouds, the air temperature, and the autumn season could not have been more perfect...
Standing outside the Weisman Art Museum on the East Bank of the campus, gazing across the Mississippi River, the stillness of the air supported a sky painted with the most gorgeous sunset...

The layered canvas of the sky seemed to hit every shade of the color spectrum that reached from bright yellow to deep burgundy, lighting up every single cloud in a different aura, balanced by the dim blue of what cloudless parts of the sky crept through the clouds.

The most amazing part of this sunset were the witnesses: Literally hundreds of students, from outside the Weisman to all the way across the wide footpath of the Washington Avenue bridge, stood there, motionless. All of us gazing in the same direction toward the sky. It was as though, for several minutes, time stood still.

I will never forget it, though I haven't thought of it in years...
Thank you @hanshotfirst for prompting this beautiful memory.
What an experience.
No one had cameras in their phones; indeed, back then, few even had cell phones...
Thus no pictures to share that wouldn't do the moment justice anyway.

Instead, imagine a legion of students with no means of recording the moment, save for offering it their full and absolute attention.
Imagine that...