The official Making Game of Thrones production blog has a post detailing the ending of season 3 filming late last year in Iceland. The environment they were in sounds rather amazing:
“We are filming by special permission at the power station in Krafla, high on the top of a mountain with steam plumes from a geothermal spa nearby twisting into the sky. Every so often a waft of the sulphurous waters blows by. It’s not really a welcome visit.”
As to what they were filming? Despite it being at the very end of the shoot, it’s an opening scene from the first episode, directed by Dan Minahan. Some spoilerish details follow:
According to a report from Icelandic news site Visir, it looks like Game of Thrones filming will wrap on the 24th or 25th. That’ll be 138 or 139 days—four and a half months—since production started. And much of it at a dead run, with at least two units, and sometimes three, working in four different locations across that time span.
So, the last few days of the production are happening right now. And according to Cat Talor, today’s a “BIG day”. Hrm… !