Looks like the Ski slope in Dubai shopping centre.
I tried to have a look at it thru the big windows in the shopping centre, but you don't see much unless you pay to get in.
Was about 45c outside when I was there
Edit:
Infact, Photo's 1 and 2 are from the spectator windows... photo 3 looks like it is shot from one of the resteraunts along the side... might even be from Gordon Ramsey's resteraunt.