“The Children” Filming Locations

Game of Thrones episode “The Children” was filmed in Antrim in the United Kingdom, Split in Croatia, and in Iceland.

Magheramorne Quarry as Castle Black

Home of the Nights Watch at the base of The Wall where Jon Snow travels. Photos of the set constructed in the disused quarry can be found here. One of the quarry walls was painted to look like ice, all of the buildings around the courtyard were built (including several interiors) as well as a working elevator.