This scheduling was inferred from the Alcazaba stating that the decks would be closed to visitors on those dates. Though the shooting dates are not officially confirmed, the speculation is solid, based on this and the dates coinciding with the announcement of the Almería province filming period: October 10th-23rd.
A few days ago, La Voz de Almeria reported their own sources gave them the dates the 20th and 21st for the Alcazaba, making it seem more and more likely that this is accurate.
The purpose of Alcazaba for Game of Thrones is unknown. Speculation runs from new possible Dornish location, to another site for Meereen. Dorne is the most popular guess though- with GoT not returning to Seville, it seems like more Dornish locations are needed, and the Alcazaba does look like a place from George R. R. Martin’s Dorne.
Filming in Almería in general is expected to begin on the 10th, at the set in El Chorrillo, Sierra Alhamilla. At least one cast member is in the area already. Iain Glen was photographed with the staff of a restaurant in Almería:
Meanwhile, back in Northern Ireland, filming and sightings continued as usual, with everyone’s favorite Worst Kept Secret™ popping up in Belfast.
One fan spotted Kit Harington at the Crown Bar:
— Julie Ann Nugent (@JulieAnnNugent) October 7, 2015
And not too far away from Belfast:
Our reader Tir Airgid has provided these new photos of the Riverrun set in progress in Corbet, Northern Ireland. These photos were taken the day before yesterday, on Tuesday October 6th. There have been some rumors surrounding the set, with IrishThrones tweeting yesterday that a gallows had been built, but the day before that tweet was shared, this was the appearance of the sets.
You can see the wooden structure in the center taking shape, but it’s too unfinished to determine what it is- a gallows, or the beginning of some other type of platform.
Thanks to WotW readers Tir Airgid and H. Stark!