Yea, it's an amazing place. It's called Laponie Ice Driving School:
http://www.lapland-ice-driving.com/
It's got nine circuits, including 1:1 replicas of Silverstone and the Nurburgring F1 track. The whole complex only occupies a small portion of the entire frozen lake, to give you some idea of the scale of the place.
It doesn't have a GT-R of its own yet (the owners are seriously considering getting one now, though) - these cars were supplied by Nissan - but there are some ace bits of kit there. A Gallardo, lots of Caymans, Subarus, Evos and so on.
They also had a 911 GT3 which appeared to spend most of its time in snowbanks and a C6 Corvette with big spotlights that looked about as far out of its natural environment as was possible