Is there a place for finding sky boxes?

It’s been forever since i needed a sky in an animation (mostly because as a beginner my animations or renders involved Indoor stuff).

I remember there being something called an HDRI Map that was supposedly taking a reflective ball and placing it on a stand somewhere and taking a picture of the ball. Somehow putting that into blender would generate a sky that looked like the area you took the picture of the ball at x:

I was wondering if there’s a place to browse through some or what not.

i was mostly wanting one with clouds kind of like this, and as i know looking for something specific can take time, i thought i would just do some browsing x:

Thank you (:

Google search for equirectangular sky (or night sky for your purpose).