Castles & palaces
Castle of San Martín de Valdeiglesias
Wikipedia names Castle of San Martín de Valdeiglesias as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Castle of San Martín de Valdeiglesias. Each title’s page links to the sentence that says so.
Filming locations nearby
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Towns & cities
San Martín de Valdeiglesias
Spain · under 1 km
Municipality of Spain
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Landscapes & nature
San Juan Reservoir
Spain · 6 km north-east
Reservoir in Spain
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Towns & cities
Pelayos de la Presa
Spain · 6 km east
Human settlement in Spain
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Towns & cities
Monasterio de Santa María de Valdeiglesias
Spain · 7 km east
Building
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Towns & cities
Villa del Prado
Spain · 13 km south-east
Municipality of Spain
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Towns & cities
Aldea del Fresno
Spain · 17 km east
Municipality of Spain