According to Morgunblaðið (The Morning Paper):
Shooting for season four of TV-series “Game of Thrones” will start this week in Iceland. Locations will include Þingvellir, Þjórsárdalur and Hengilsvæðið according to [our] sources. The last two seasons have also partly been shot in Iceland, during the winter, but now the countryside will be allowed to sport the colours of summer.
Þingvellir was previously reported as a possible location, with fans noting the name of the place loosely translates as ‘ting field,’ a place of government assembly, as the site was the original home of the Icelandic Parliament in 930 A.D. Sometimes ‘ting’ is translated as ‘moot,’ leading to speculation this filming may be connected to a similar event in the books.
Þjórsárdalur and Hengilsvæðið are both green valleys located in southwest Iceland. Þjórsárdalur, pictured at right, features forests, waterfalls, and cliffs. Hengilsvæðið is located around a volcano and is rich with geothermal activity.
It’s unknown at this time which scenes or storylines will be filmed at these locations.
UPDATE: Maisie Williams and Gwendoline Christie have both been spotted in Reykjavik in the last couple days by fans, in addition to anonymous reports WiC received about sightings, so it’s safe to say they’ll be shooting there soon. So that’s at least two different storylines being shot in that area.
Ours is the Fury: Big thank you to our reader, Squealer, for the translation! The national parks in Iceland are yielding some beautiful new locations. There are a variety of storylines that could be used for these sites, and the pacing won’t be as easy to guess at from here on out, I suspect, making it even harder to predict what’s being filmed where. The landscape is still suggestive of the North and the Wall, and the notable outside scenes set at the Wall will very likely be filmed here but there may be more.