Much of the original native forest still remains and integrates beautifully into the structured design of the garden. This fusion of wild and domesticated nature makes for an incredibly valuable space in terms of ecology and biodiversity. Despite urban growth in Béjar, this green space remains superimposed onto the urban fabric and it is both a conservation delight and challenge.

There is a dense forest of chestnuts and Pyrenean oaks on the south side, species that are native to the local mountain ranges. Alders, willows, cottonwoods and ash trees are also native species that can be found along the humid borders of the site alongside the poplars lining the boulevard.

There are banana trees and horse chestnuts in the garden and, of course, a majestic and singular yew tree (taxus baccata) next to Sábana fountain.

However, in the Romantic era garden, the huge conifers that were planted in the late 19th century are undoubtedly the most striking of them all. The large redwood (sequoiadendron giganteum) stands tall above them all, alongside incense cedars, spruces, lime trees and magnolias. Some of the ancient boxwoods that were part of the original geometric lattice in this terraced garden still remain.

The wooded area also has fruit trees, many types of bushes, flowers and decorative plants adorning the parterres and there are hedges and other features dotted around the garden.

Of course, we must not forget that there are also several species of birds, amphibians and reptiles in the diverse natural habitat of Béjar Forest. Visitors often come across deer, stags, foxes, wild boars and wildcats, plus diverse smaller fauna that is typical of highland ecosystems.