The formation is part of the volcanic complex of Montaña Blanca, which last erupted approximately 3,000 to 5,000 years ago.
The fissures act as natural ventilation channels, often creating a microclimate that is noticeably cooler than the surrounding sun-exposed terrain.
The rock layers visible within the walls show distinct cooling patterns from ancient magma flows.
The site was historically overlooked by mainstream tourism until it gained popularity through social media as a unique geological photo opportunity.
Las Grietas is a series of narrow, deep volcanic fissures located on the flank of the Montaña Blanca volcano in Lanzarote. These geological formations were created by cooling lava flows that cracked over time, resulting in tight, vertical corridors of basaltic rock. The site functions as a natural canyon that visitors can walk through, with walls reaching several meters in height. The terrain is composed entirely of volcanic debris and rock formations, offering a stark landscape characteristic of the island's unique geology. It is an open-air site accessible directly from the adjacent roadside area. The rock walls create natural acoustics and narrow shadows that contrast with the open volcanic plains surrounding the site.
The narrowest part of the main corridor where the high rock walls converge, creating dramatic light and shadow contrast.
Wear closed-toe shoes with sturdy soles to navigate the uneven, rocky, and loose volcanic terrain.
The narrow passages can become congested; visit during off-peak hours to avoid waiting to pass through the tighter sections.
Bring your own water, as there are no facilities or amenities available at the site.
Do not attempt to visit in open-toed sandals or flip-flops, as the sharp volcanic rock and uneven ground pose a high risk of injury.
Do not climb on the delicate volcanic rock walls, as the material is brittle and prone to erosion; practice Leave No Trace principles.
