Explore the mysterious giant rings of the Mediterranean, buried at a depth of 120m, with the world-famous Laurent Ballesta, world-renowned diver and his team, to understand the origin of these unique and unknown formations.

Cast:Laurent Ballesta, Sarah-Jane Sauvegrain, Antonin Guilbert, Thibault Rauby, Roberto Rinaldi,

Genre:Documentary,

country:France,

Production:ARTE, LGB, Andromède Océanologie,