Things have been quiet on the House of the Dragon front since their filming in Cornwall led to fans getting their first glimpses of some of the lead actors in costume. Now, thanks to Spanish newspaper Hoy, we learn (thanks to our friends at Los Siete Reinos) that House of the Dragon is set to film for three weeks in October in the Extremaduran city of Cáceres and the town of Trujillo. Both of these were used during filming of Game of Thrones, with the town of Trujillo providing the walls of King’s Landing and Cáceres as the location for a procession scene in King’s Landing featuring Euron Greyjoy as well as scenes set in Oldtown.
Per Los Siete Reinos, the three weeks would include pre-production time, so actual filming there will be shorter.
Update June 30th: A second article from Hoy concerning the filming in Cáceres also reveals that the show will be filming in the Portuguese village of Monsanto.