Journey to the depths of the abyss and witness the unseen.
Here's one I'm very fond of, so I hope you'll like it!
I definitely had in mind the image of a hostile journey to the bottom of the ocean when composing and re-listening to this, but then again... the image you hear is your own :).
Enjoy!
Please contact me if you would like to use this in a project. We can discuss the details.