Where was The Heart of the Earth filmed?

2007 film by Antonio Cuadri

The Heart of the Earth (2007) was filmed in Madrid, Portimão, Minas de Riotinto, Linares de la Sierra, Trigueros and Mazagón, 6 places named in its Wikipedia article, in Spain, Portugal. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data