What are some examples of atoll island?

* Bikini Atoll is a group of 23 islands in the Pacific Ocean, located in the Marshall Islands. It is best known as the site of the United States' first nuclear weapons tests.

* Palmyra Atoll is an uninhabited atoll in the Pacific Ocean, located about 1,000 miles (1,600 kilometers) south of Honolulu. It is a National Wildlife Refuge and is home to a variety of seabirds, turtles, and other marine life.

* Kwajalein Atoll is the largest atoll in the world, located in the Marshall Islands. It is home to a large US military base.

* Majuro Atoll is the capital of the Marshall Islands. It is located in the Pacific Ocean, about 2,200 miles (3,500 kilometers) southwest of Honolulu.

* Rangiroa Atoll is a large atoll in the Tuamotu Archipelago of French Polynesia. It is a popular tourist destination and is known for its beautiful lagoon.