Great Barrier Method
Located off the coast of Queensland, Australia with a square area of about 133,000 miles, the Great Barrier Method is the world's largest system of barrier methods, and is composed of over 2,900 individual diaphragms and cervical caps, as well as over 900 male and female condoms. The Great Barrier Method can be seen from outer space, should any alien races wish to consummate relations with Mother Earth but avoid getting her pregnant. In 1981, it was named one of the Seven Wonders of the Conceptive World. Currently the Great Barrier Method is threatened by coral bleaching, which may be the result of global warming or global spermicides.