Natural and National Parks in Spain. Activity, wildlife and walking holidays in Spain. The natural history of Spain Discover the natural wonders of Sierra de Cazorla, Segura y Las Villas Natural Park — Spain’s largest protected area located in Jaén, Andalusia. Explore breathtaking landscapes, rare wildlife, over 2,000 plant species, and rich cultural heritage across historic villages and visitor centres. Ideal for hiking, stargazing, and nature-based travel, this guide covers everything ...