'RECOLONISED AND REVEGETATED'
The path of about 800 metres (875 yards) lets visitors wander between rusty cannons and bunkers, with breathtaking views towards Cap Frehel and the Pointe de la Varde.
Since the opening of the path, "there has been no accident" even if "there are always people who want to go beyond the authorised section," said Jean-Christophe Renais, a coast guard.
Over time, colonies of seabirds have reappeared, including seagulls, cormorants, razorbills and guillemots.
"Biodiversity is doing wonderfully, everything has been recolonised and revegetated, birds have taken back possession of the site," said Gwenal Hervouet, who manages the site for Conservatoire du Littoral.
"It's just a joy."
Because of the focus on restoring wildlife, the trail was partially closed in April "to maximise the chances of success and the flight of peregrine falcon chicks," said local conservation activist Manon Simonneau.
Some walkers say they hope the trail will be lengthened to allow a complete tour of the island, but according to the Conservatoire there is little chance of this -- the cost of further demining would be astronomical, so it is now birds and nature that are the masters of Cezembre.