Renowned for its pristine beaches and dramatic granite cliffs, the Italian island of Sardinia has long been known as a jet-setters' paradise. But away from the mega yachts and glitterati of its glamorous Costa Smeralda resort, much of the Mediterranean's second-largest island remains a rugged, unspoiled wilderness waiting to be explored.

Now, a group of hikers and former miners are hoping to lure adventure-seekers to Sardinia's seldom-visited south-west coast by offering free lodging along the island's stunning 500km Santa Barbara Mining Route.