Stretching nearly 100 kilometres, the Verdon Gorge is Europe's largest canyon, with majestic cliffs climbing up to 750 metres in height. The emerald hue of the Verdon River's waters, hidden far below this blanket of clouds, lends its name to this spectacular natural site, shaped by millions of years of erosion. Visitors or residents of Alpes-de-Haute-Provence Hiking in the southeast of France can visit the canyon for rock climbing, kayaking, paragliding—the adventure options are endless. If you find yourself in Marseille or Nice, a day trip may be in order.