That's the same mall I showed you yesterday, the central hall. The hall located on the bottom level (out of 3 total), there are grand stairs to the next level, a fontain in the center and glass-boothed elevators (I turned my back to elevators while taking this picture). There is also a coffee-shop in front of the staircase, and if you sit close to the fontain it would spatter you with water dust.

As for festivals you asked about, Christmas is celebrated in Russia but not as widely as New Year. We do exchange gifts on one or both of these occasions, though for most people New Year is the 'main' holiday.

P.S. Another version on my extension site.