More impressive than the springs is this gizmo for seeing underwater.  A couple of big mirrors allow you to look at the weeds and whatnot in the springs.  I’ve turned the photo upside down so you can see.  Not as much as you’d want however, because the dudes who built it didn’t think about the stray light getting in, which reflects off the glass and spoils the effect.  If they had made the roof a metre or two longer, you could have stood in the shade and seen the underwater world in all its glory.  But they didn’t.