Beyond lunar landscapes, active craters, and lava flows, Mount Etna hides a fascinating and still little-known underground treasure: volcanic caves. Carved by lava over thousands of years, these natural cavities offer a unique insight into the volcano’s eruptive activity and tell its history with surprising detail.

What are volcanic caves?
Mount Etna’s caves, or more technically “lava tubes,” are formed during effusive eruptions when the outer part of a lava flow cools and solidifies, while the still-hot interior continues to flow. When the internal lava drains away, it leaves behind a natural tunnel.

Mount Etna’s most famous caves:

Grotta Cassone, Grotta delle Palombe, and many others can be visited on guided excursions equipped with helmets and lighting.
Why visit them?

Beyond the geological aspect, these cavities represent an ideal habitat for several endemic invertebrates and also reveal the history of human-volcano interaction: many were used as shelters, snow deposits (neviere), or even as places of worship.

Safety and accessibility
Visits to volcanic caves must always be conducted with an expert guide and proper equipment (helmet, torch, trekking shoes). Some caves are easily accessible, while others require a good level of physical fitness.

Grotta del Gelo: One of the most famous, situated at an altitude of approximately 2,030 m; it preserves a small perennial glacier inside—a climatic anomaly in Sicily.

Grotta dei Lamponi: About 600 meters long, it is among the most extensive on the volcano.

Grotta di Serracozzo: Located along one of the most fascinating trails on the eastern slope, offering spectacular plays of light.