Griffon Vultures are usually seen circling high overhead. About 400 pairs breed at the Hoces del Duratón Natural Park, and they fly within metres of you.
Segovia is well-known for its human history, but it also has a huge amount of natural history to offer.
The Santoña, Victoria and Joyel Marshes Natural Park is probably the best, and most easily accessible, wetland in north-western Spain.
A round-up of opportunities for watching and photographing bears in Europe