Hormuz Island is a salt dome — a teardrop mound of ancient rock salt that pushed up through the seabed off the mouth of the Persian Gulf — and the more than seventy minerals riding within it have stained the whole island in bands of red, ochre, yellow, violet and silver. The salt is among the oldest on Earth, some 600 million years old, and rose slowly through overlying rock until it broke the surface. Iron oxide stains the ground deepest of all: at Red Beach the sand is a true crimson, and breaking waves tint the shallows blood-red. Locals call the place the Rainbow Island, and its most photographed spot, the Rainbow Valley, layers dozens of mineral tones across eroded slopes like a spilled paintbox. The red earth here, known as gelak, is clean enough to eat — women grind it into a spice that colours a local sauce called sooragh and the bread baked with it.
Wandering Hormuz feels like walking another planet: salt caves glittering white and rose, a valley of wind-carved rock statues, ochre mud coves, and a glinting salt stream running to the sea. On the island's northern tip stands the red-stone Portuguese Castle, Fort Nossa Senhora da Conceição, begun in 1507 when Afonso de Albuquerque seized this choke-point of the India trade; the Portuguese held it until 1622, and its ramparts now face the water in silence. At dusk the whole island glows copper, and on some dark nights the shallows flicker blue with bioluminescent plankton. Still untouched by mass tourism, Hormuz keeps the rhythm of a small fishing village wrapped in extraordinary ground.