Montaña Amarilla (Yellow Mountain) is a volcanic cone at the southern tip of La Graciosa, about 2km from Caleta de Sebo. It is one of the most distinctive geological features on the island, with an unusual yellow-orange colour caused by mineral oxidation. The walk to the summit takes 20-30 minutes from the base and rewards with panoramic views: north across the island, south over the strait to Lanzarote's cliffs, and west out into the open Atlantic.
At the base of the cone, on the sea side, is a small saltwater cave accessible at lower tides. The round trip from Caleta de Sebo, including a stop at the summit, takes about 2-3 hours on foot. This is one of the better short walks on the island.