Explore the historic home of an extraordinary family of birds of prey in a look at the wildlife living in the nature reserve surrounding Germany's Heidelberg Castle

Flocks of birds, families of wild boar and armies of insects thrive in and around this centuries-old fortress. And years of human inhabitants haven't put them off.

In modern day Slovenia lies the world's largest castle carved into a cave. Predjama has provided protection not only for its Medieval human inhabitants, but has also served as a haven for the birds, boars and mountain goats that surround the region.

The marvellous Alhambra sits atop Sabikah hill in the Grenada region of Spain. For centuries, states have fought back and forth to control the fortress, but today the castle stands as a refuge for the wildlife of the surrounding area.

Despite being one of Germany's most-visited attractions, Neuschwanstein castle and its surrounding forests also hold importance for a variety of creatures and has been a natural haven for centuries.