There is something in place here, though, that I can't seem to get through. It's weird. I can phase into the dome, but not through completely to the water. Though, I can only go a certain distance... I have to hold my breath while I do it. If we're down too far, I wouldn't be able to get to the surface before needing to breath.
There's also something underneath... I can only go down into the ground so far before it blocks me, so I can't get under the dome and outside that way, either. It's a material I've never come across before.