Sublime: that which is profoundly beautiful.
It can be terrifying or disturbing. It will certainly be challenging and extremelly well wrought.
It is not the only form of beauty but it is one of the most important as it evokes issues held somehow sacred. Thus, it entails the wider axiological triangle of ethics, morality and aesthetics.

Thank you so much.
It’s gorgeous. I love the mood it creates.
What a beautiful post. I love the photograph, and your description was lovely!