It's a crossroads, a refuge, a launch pad to the summits. Bourg-Saint-Maurice and Les Arcs, two faces of the same territory, between lively valley and high altitude balconies. In this special report, we explore the powerful links between the town and its resort, seasonal life, sustainable projects, hilltop villages and the local players who make the heart of the Haute Tarentaise beat faster. Twenty articles tell the story of the diversity of this unique region: from the market in Bourg to the peaks of Les Arcs, from cultural life to tourism innovations, from the funicular railway to the mountain pastures. It's a portrait at altitude, lively, full of contrasts and deeply human.