The rock layers here, known as the Ajuy Basal Complex, contain pieces of the African tectonic plate that were pushed to the surface during the island's formation.
These caves provide evidence of the ocean floor uplift that helped create the Canary Islands archipelago.
The black sand on the beach consists of eroded volcanic material, distinguishing it from the white sand found on many other Fuerteventura beaches.
The site features remnants of old lime kilns which were once a significant economic activity for the local residents.
The caves are deep enough that high tide can submerge the lower sections, creating a dynamic environment that changes throughout the day.
The Cuevas de Ajuy are massive sea caves located on the western coast of Fuerteventura, formed from volcanic rock dating back approximately 70 million years. These caves are part of the Betancuria Rural Park and constitute the oldest geological site in the Canary Islands. The area features a dramatic interface between deep-sea oceanic crust and sedimentary rock, known as a basaltic complex. Visitors reach the caves via a coastal trail starting from the black sand beach in the village of Ajuy. The caves were historically used by pirates to store loot and are carved into high cliffs battered by the Atlantic Ocean. The hike provides a clear view of fossilized dunes and lime kilns that reflect the island's industrial history.
The elevated viewpoint on the trail looking back toward the cave entrance and the Atlantic coastline.
Wear sturdy, closed-toe walking shoes as the path consists of uneven, loose volcanic gravel and rock.
Bring a small flashlight if you plan to walk deep into the cave interior, as natural light fades quickly.
Check local tide tables, as the path and cave entrances can be slippery and dangerous during high tide or heavy sea swells.
Attempting to climb the unstable cliff faces surrounding the path; avoid visiting during high-surf warnings when waves can reach the trail.
Stay on the designated trails to protect the fragile geological formations; do not remove any rocks or fossils from the area.
