Really nice ! I like the fact that this isn't a place on the border of the lake it changes. Also nice integration of the structures in the cavern walls.
looking forward for these extensions too
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A small critic though, I like the fact that this is a really confined space but somehow it lacks a good panorama of the whole place, there is no spot where you can enjoy the view of the whole complex. ( I'm saying that because you can have such views with flymode).
Also the camera transition at the top of the stairs is a bit abrupt..
Really looking forward for the next areas.
PS: also love the rubble on the pavement it rejuvenates this overused texture nicely !