If we Cueva de la Garganta (the throat cave), located in a beautiful spot in the municipality of Senija we find a wonder of nature that can rarely be seen with the naked eye: a fossilized tree.

Generally, these crystals are formed by precipitation of the bicarbonate and carbonate anions combined with catechy of Ca, Mg... Generally for processes linked to the dissolution of rock (cartification) and subsequent precipitation in tectonic cracks, in fissures or cavities (caves).