There is a feeding presentation near Aínsa (lower Pyrenees area). They buy up leftover meats from restaurants, farmers and butchers and place it all near a cliff that's about a 15 minute hike from the town.
The tourist money (about 10 euros for admission) is used in Bearded vulture conservation.
I saw 2 black kites, 5 Egyptian vultures, about 20 ravens and at least 200 Eurasian griffon vultures!
We later also saw an Egyptian vulture flying over our car on the way back (probably one of the same ones), but sadly no bearded vulture