El Hombre y la Tierra
The legendary and pionnering series directed by Félix Rodríguez de La Fuente, produced by RTVE between 1974 and 1980, and including 124 episodes, most of them shot in Spain. Memorable episodes were recorded in Doñana and Cazorla. Those documentaries had massive impact on Spanish society and the conservation movement. The full series is available in YT… and still interesting, if only for the truly iconic theme song.
Doñana, an oasis for Europe (1998), available in English. Planetdoc’s page. A fairly good description of “one of the most important parks in Europe”.
WildMed, the last Mediterranean forest. A 2014 movie, distributed and seen in cinemas, directed by Arturo Menor which has become a classic of the genre. Excellent documentary very well filmed, both epic and didactic at the same time, even including rather rare images of invertebrates. More clips on the director’s page.