How to hide pond tubing ?

I’m building this new waterfall pond connected to my old one . Any suggestions on how to hide the hideous hose ?

I would think , bury it with rocks , gravel or dirt …….

If planning ahead, it is easy to lay the hose under the pond liner towards the edge of the pond. The plumbing is normally put in after a pond is dug, but before the Liner/Cement shell is done. At this point you could dig as much as possible to give a trench to bury it against the block wall. Like your sprinkler is done.

Plant a line of marginal-type plants all along in front of it.

Just a thought for you... A terrapin can easily climb out of that pond area at the upper right corner in your first photo. Where the flexible pipe goes over the Waterfall edge by the block wall.