Wonders of the World

 

Great Barrier Reef, Queensland, Australia

Located off the coast of Queensland in northeast Australia, the Great Barrier Reef is the largest living structure on the planet. It is composed of over 2,900 individual reef and covers roughly 135,000 square miles (350,000sq km), making it bigger than the UK, Holland and Switzerland combined. It's so enormous, in fact, that it can be seen from outer space. Despite environmental threats, it's teeming with marine creatures – around 10% of the world's total fish species can be found within the ancient reef alongside whales, dolphins, porpoises and dugongs.