On the list are America’s Grand Canyon, the Harbor at Rio de Janeiro in beautiful Brazil and of course, Australia’s Great Barrier Reef. The underwater gem spans 1,400 miles of the ocean Down Under, and is widely known as the world’s largest living structure.

Scientists have sounded alarms on the death of corals which has been exacerbated by global warming. They have warned the Great Barrier Reef near Australia is reaching a 'tipping point' which could be devastating for the marine ecosystem which thrives on it.

Parts of the Great Barrer Reef have suffered the highest coral mortality on record, Australian research showed Tuesday, with scientists fearing the rest of it has suffered a similar fate.

A new study by the Australian Institute of Marine Science unveiled parts of the Great Barrier Reef are suffering unprecedented coral mortality, and the worst fear is that such damage could be widespre

Parts of the Great Barrer Reef have suffered the highest coral mortality on record, Australian researchers say, and they fear the rest of it has suffered a similar fate.

Parts of the Great Barrier Reef have suffered the highest coral mortality on record, Australian research showed, with scientists warning of a "tipping point."