Famed for winter skiing and summer hiking and climbing opportunities, the Dolomites are a section of the Alps in northeastern Italy, running roughly from Pieve di Cadore in the east to the Adige River in the west. Marmolada, just east of Trento, is the highest peak, at nearly 11,000 feet. The dramatic and craggy mountains are famed for their unique colors, which are the result of their partial formations as undersea coral colonies before being pushed upward millions of years ago.