The Montebello Islands, located 20 km north of Barrow Island and 130 km off the Pilbara coast of Western Australia, offer a unique and diverse range of attractions. The archipelago, comprising around 174 small islands, is renowned for its rich marine biodiversity, making it a hidden gem for divers, snorkelers, and anglers. The islands boast untouched lagoons, barrier reefs, and fringing reefs that are home to over 150 varieties of coral, 450 species of fish, 630 types of mollusks, and 170 species of sea stars, urchins, and other echinoderms. The area is also a favorite foraging spot for dugongs, dolphins, and at least 10 species of whales. The sandy beaches attract nesting green, hawksbill, and flatback turtles, while the coastal mangrove forests serve as a rest stop for rare migratory wading birds. The Montebello Islands are part of the Montebello Islands Marine Park, covering more than 58,000 hectares of ocean and over 250 low-lying limestone islands and islets.
In addition to its natural beauty, the Montebello Islands have a rich historical significance. The islands were the site of three British atomic weapons tests in 1952 and 1956. As a result, visitors are advised to limit their visits to certain areas due to slightly elevated radiation levels and to not disturb the soil or handle relics associated with the tests. The remnants of these tests, including concrete bunkers, monitoring stations, roads, and scrap metal, can still be found on some islands.
Visitors to the Montebello Islands can engage in a variety of activities, including fishing, diving, snorkeling, and camping. Camping is allowed on several of the islands within the marine park, offering a unique opportunity to experience the natural beauty of the area.