Flying in the sky during daytime and looking at the horizon. On the top the sky, a perfect blue with a color gradient from ocean blue to blue, then the horizon, a beautiful line with color gradient from sky blue to white. I don't know if the image will get displayed but like this (I took it a couple of months ago):
https://imgprxy.stacker.news/NUaxugiwcjsQorIoDLOyLZHEjwQSMtqv1QYl-vjn364/rs:fit:600:500:0/g:no/aHR0cHM6Ly9jZG4ubm9zdHIuYnVpbGQvaS85OGRjYjExZTg2MDcyNzc4YTA3YzJjZmRhNzhhNjExZTU0NGYzNGI3MTkyY2M2ZjAyY2NhOGUxMjU2NzYyYWNhLmpwZw
And this:
https://imgprxy.stacker.news/XHOgEvxKDuDZYqKR4ToPvaWkKUfQqvnD-0Kd1oYaFAE/rs:fit:600:500:0/g:no/aHR0cHM6Ly9jZG4ubm9zdHIuYnVpbGQvaS9hNmQ4NzI1NGExODI1OGUxMTMwNTZhYjA2OGU0NTU0YTJhMDJjYzEwYjcyZTIwYWFjZmI3Nzc5MGJkZmQ1NjM5LmpwZw

And also looking at the clouds in the mountains before a typhoon, I always felt humbled when I was looking at it.