The ritual of the sunset is practiced all over the world. I first noticed it on a trip to Key West, where at sun down the west end of Key West comes alive with buskers entertaining the tourists. We all watch the progress of the sun setting, when it was done applause ensued. A well earned applause it was.
Denver has many locations to watch this ritual. The front steps of the Natural History Museum are a popular place. I find I could sit there for most of the day, never moving just watching the show of clouds against the mountains and people strolling by.