Riddle 1

Sculpt as those who live underground,

Yet, overhead, far more oft am I found.

Should my current ever run dry,

Then once again in darkness I lie.

What am I?

I haven’t written anything in forever and I wanted to ease my way back into the community, my intention is to eventually start writing stories. I thought riddles would be a fun way to come back and I’ve never tried writing them before, feedback and guesses at the answer are very much appreciated!