It’s a 648m lava tube which analyses the introduction of certain animal species throughout history. The Cueva del Llano is a volcanic tube of considerable dimensions, located in Villaverde, which is accessed by a large ravine that divides it into two branches: one to the north, longer and steeper, and another to the south, the upper slope of the wash. The northern branch is 500 meters long and easily accessible. In a study carried out between the years 90 and 91, an arachnid troglobid endemic to Fuerteventura was discovered living in the last section of the northern branch of the cave. This is the Majoreus Randoi Rambla, which has turned out to be a new species and also a new genus.
The existence of the Spernophorides Fuertecavensis Wundierlich spider has also been detected, with adaptation to the caveman environment, but not as accentuated as the previous one. The presence of an important paleontological site, very rich in remains of vertebrates and gourmet fossils and subfossils, has also been evidenced after an excavation.