About This Tour
The lava tunnels in Reunion are becoming an essential activity on the island. There are very few places in the world where it is possible to have such an experience. During this underground exploration you will discover a universe worthy of Jules Vernes. The Piton de la Fournaise offers us this opportunity. The instructors who will supervise you will be happy to explain to you how these famous lava tunnels form and will share with you their passion for volcanology through this "volcanic speleology".
Photo Gallery
lava drop, lava tunnel from 2004.
Main entrance to the 2004 lava tunnel.
How is a lava tunnel formed?
play of light and shadow in the 2004 lava tunnel.
stringed lava from the 2004 lava flow
skylight (cathedral) sports tunnel 2004 exit
TopTours Insights
Guided tour of the 2004 lava tunnels
Explore the 2004 lava tunnels on a 2.5-hour guided tour with Tunnel de lave: reunionmeretmontagne. This experience is ideal for adventurers interested in geology and the unique volcanic landscapes of Reunion Island. Expect a moderate pace suitable for those who enjoy active exploration.
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What's Included
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Additional Information
Meeting Point
Meeting point: Parking lot for the 2001 lava flow on the RN2. Enclosure of the great burnt. From St Gilles around 2h00 drive and from St Denis around 1h30 drive. On Waze type "2001 lava flow"
Special Instructions
In the 2001 lava flow parking lot, ask for Fred or Ludo from: Réunion mer et montagne.com
Cancellation Policy
For a full refund, cancel at least 24 hours before the scheduled departure time.
✓ Free cancellation due to bad weather
Tour Operator
Tunnel de lave: reunionmeretmontagne
Official supplier for this experience. Bookings are handled directly through Viator with verified partners.
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Trusted local operator
Guest Ratings
Total review count and overall rating based on Viator and Tripadvisor reviews
Based on 336 verified reviews
Average rating
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Frequently Asked Questions
Common questions about Guided tour of the 2004 lava tunnels
Who operates this experience?
This experience is operated by Tunnel de lave: reunionmeretmontagne, a local adventure provider.
What's included?
This tour includes All safety and comfort equipment will be distributed to you. helmets, gloves, knee pads and headlamps.. All inclusions are provided by the tour operator.
How long is this tour?
The experience lasts approximately 2.5 hours, giving you time to fully enjoy your chosen activity.
Can I cancel this tour?
Yes, you can cancel up to 24 hours before the scheduled departure time for a full refund. If weather conditions are unsafe, the tour may be canceled by the operator. In such cases, you'll be offered a refund or reschedule.
What should I bring?
Bring comfortable walking or hiking shoes, a water bottle, and appropriate clothing for the activity level. Safety equipment is provided as needed.
Is this tour worth it?
Yes, this experience has a 5.0-star rating based on 336+ reviews, making it a highly rated option.
What to expect on this tour?
This adventure experience lasts approximately 2.5 hours and includes all necessary equipment and guidance. You'll have access to All safety and comfort equipment will be distributed to you. helmets, gloves, knee pads and headlamps..
What fitness level is required?
This adventure activity requires a moderate level of physical fitness. Please review the tour details for specific requirements, or contact the operator if you have concerns about your fitness level.
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