I believe it is where engine runs take place. The high circular walls stops the jetblast from damaging whatever is behind it and I think it also reduces noise. Here are a few pics from previous A380 uses.
So much movements today, isn't bank holiday in france or germany as it is in italy today?
In Germany, there is a public holiday on Nov. 1 (All Saint's Day) only in the predominantly catholic states (e.g. Bavaria). Airbus production sites (at least all major ones) are located in states that don't have a holiday today.