Geographically, the Dolomites are actually a sub-range of the Italian Alps, but they differ significantly in geology and appearance. A supportive peer "visual" guide: the broader Alps (like those in Switzerland or France) are primarily composed of granite and metamorphic rock, resulting in dark, jagged, "classic" mountain peaks often covered in permanent glaciers. The Dolomites, however, are made of dolomite (a type of limestone), which gives them a distinct pale, "ghostly" color and vertical, box-like towers. This unique stone was formed from ancient coral reefs on a prehistoric seabed, which is why the Dolomites are a UNESCO World Heritage site. While the Western Alps are taller (home to Mont Blanc at 15,777 ft), the Dolomites are famous for the "Enrosadira" phenomenon, where the pale rock turns vibrant shades of pink and orange at sunset, a sight you won't see in the granite-heavy Swiss Alps.