Bogon Flux, by Blotto Epsilon and Cutea Benelli, is (according to the artists) "a scrap metal steampunk structure that defies gravity". They also recommend that you watch out for the falling parts -- I found the robotic rats that fall from the sky when the sculpture explodes quite entertaining. The exhibit moves, and builds, and transforms itself around you. It is mesmerizing to say the least - I found myself spending quite a bit of time at the installation being fascinated by the vitality of it.
I took these images to the programmed parcel sky setting. Go to the Environmental Editor in your World Tab and select "use region settings" to get this effect.
The exhibit will be open through the end of September 2013 at LEA 20 and his highly recommended for a visit. A book and helmet are available as gifts at the welcome area.
To read more about Bogon Flux and see excellent photography:
To find out more about Linden Endowment for the Arts"
There are several machinima on YouTube showing an older version of Bogon Flux in Second Life in 2008. I liked this one by Mescaline Tamas: