It was on the farthest wall, where the shadow was deeper, directly opposite this tunnel. When completely open, it would be big enough to fly our shuttle through. (Which was something we absolutely would not be doing, because holy shit no, what a bad idea.) It was set between two giant rounded half-pillars carved out of the rock wall, angled back as if to brace the sloped stone slab above it. I guess that was the pillars’ purpose; if they were supposed to be making the place pretty, they weren’t doing their job.