Visiting Spain

Visiting Spain
 

I am interested in doing a walk for a day or two in Andalusia, possibly in a National Park but could be elsewhere. I would like to include nature activities like bird watching.
Has anyone been walking in this area and if so what organisation did you go through and what was your experience?
What is your recommendation of place to go for interesting scenery and wildlife?

The marismas is a huge wildlife region at the mouth of the Guadalquivir. It's a bird watcher's paradise. Much of the region outside of the marshes is very dry like the Sahara north. It is also mountainous. The principal cities are gorgeous oasises.

Gracias

I will study that up.