The Great Barrier Reef is divided into inside and outside. The inner Barrier Reef is most affected by human beings, so the scenery is far inferior to the outer Barrier Reef. The Inner Barrier Reef is most famous for its green island. Tourist groups usually choose this one, which is close and convenient. However, due to the close offshore, too many tourists, coral growth is slow and extremely fragile, the quality of the landscape can be imagined. So we should try our best to choose.