365 days of SL, day 42:
(Click for larger — 1920x1033 PNG, 2282 KiB)
BG's cell block got changed again recently — the central observation area is gone and replaced with a smaller (elevator?) tube, which gives the whole area a much more open feeling again, there's extra archs between the four cell blocks (not leading anywhere yet), and so on. The cells on the second level are also arranged in the previous panopticon style again (or perhaps still), unlike the individual blocks on the primary level that harken back to the 2008/2009 incarnation of BG (see day 26 and day 5 for more on that).
I rather like having many levels of cells stacked on top of each other. Even if most of them aren't used (online players are more likely to, well, play than to be in their cells, and those that are offline aren't present as avatars, obviously), it adds to the atmosphere.
You can also see how the walls between the cellblock levels and the open space in the middle are slotted now; the effect of this is that while someone in the middle of the whole area can see all the cells, you can't see other cells if you're in one. (You CAN see the middle, which technically you shouldn't be able to in a real panopticon, but that'd be difficult to accomplish at best.)
Location: Black Gazza (200, 179, 1211)