About us
What am I?
I'm Alexandre Meyer, founder of Antre Terre et Mer 974.
A former rescuer with the Peloton de Gendarmerie de Haute Montagne (PGHM) and holder of the DEJEPS in caving since 2019, I have spent 22 years exploring, rescuing and supervising in mountain and underground environments.
It was during this career that I discovered my true passion: the underground world and all its facets - exploration, safety, sharing.
Now settled in La Réunion with my family, I'd like to put this experience to good use for those who want to experience an unusual adventure beneath the island's surface.
My aim is to share my passion with you, by taking the time to talk, share and experience these rare moments together in the heart of the lava tunnels - real jewels in Réunion's natural heritage.
Music, ultra-trail, mountaineering, freediving and scuba diving are also among my passions... but I prefer to tell you about them on the ground.
Come and experience Antre Terre et Mer 974 - I'll be delighted to guide you through Réunion's lava tunnels.
Antre Terre et Mer?
Beneath the island's intense surface lies a fascinating world, sculpted by fire and time. Antre Terre et Mer 974 invites you to explore Réunion's lava tunnels in a different way - in a small group, at your own pace, and in complete safety.
Created in August 2025, Antre Terre et Mer 974 is the result of a deep-seated passion for caving and a love affair with Réunion Island. We offer tailor-made explorations, adapted to your wishes and your level: from contemplative walks to major sporting events, with family, friends or colleagues.
Limited groups, privatisations from 4 people upwards, professional supervision: everything is designed to ensure that your experience is unique, authentic and stress-free. For professionals, we also design tailor-made corporate seminars around key themes: cohesion, surpassing oneself, leadership... An underground adventure that unites teams and reveals talents.
For your peace of mind
Terms and conditions of sale
Professional liability
Professional Educator Card
Mediation certificate
State Caving Diploma
