Located just off the coast of Costa Smeralda, Mortorio Island is a small uninhabited islet known for its granite scenery. The defining geological feature of the island is its pink granite rock formations. During sunset, minerals embedded in the granite reflect sunlight in a unique way, causing the rocks to shift through hues of bright pink to deep crimson. This color display is clearly visible from passing boats, offering a demonstration of how coastal geology can dramatically shape visual landscapes.