Adventure · Fournaise massif, Plaine des Sables, East coast
Lava tube exploration
Venture into the underground passages carved out by lava flows.
Inside the volcanic massif of the Piton de la Fournaise, old lava tubes form a fascinating underground network. These galleries, sometimes several hundred metres long, were formed during past eruptions, when the outer crust of the lava cooled while the still-liquid lava kept flowing underneath.
Guided tours are run in various tubes around the island. The temperature inside is cool and constant. Some contain spectacular mineral formations.
Why do it
Walking inside the volcano and understanding from within how the rock is built — a geological experience unlike any other in the world.
What to expect
Some passages are low and narrow. A helmet and head torch are essential (provided by the guides). The atmosphere can be damp.
Who it’s for
Suitable for most people. Not recommended for people with severe claustrophobia or very limited mobility.
Practical tips
Wear closed shoes and clothes you don’t mind getting dirty. A jacket is recommended (it’s cool in the galleries).
Who to go with
Do you offer this activity? Two partner provider spots are open for each activity.
Become a partner
