* China: China is the second-largest source of visitors to the Great Barrier Reef. Chinese tourists are attracted by the reef's natural beauty, as well as its reputation as a world-class diving and snorkeling destination.
* United Kingdom: The United Kingdom is the third-largest source of visitors to the Great Barrier Reef. British tourists are drawn by the reef's warm waters, coral reefs, and abundant marine life.
* United States: The United States is the fourth-largest source of visitors to the Great Barrier Reef. American tourists are attracted by the reef's diverse marine life, as well as its opportunities for adventure activities such as diving, snorkeling, and sailing.
* Other countries: Visitors to the Great Barrier Reef also come from a variety of other countries, including Germany, France, Canada, and Japan.