Johnston Atoll and biological weapons testing site, a secret missile base, and a chemical weapon and Agent Orange storage and disposal site. These activities left the area environmentally contaminated and remediation and monitoring continue. The Johnston Atoll is a deserted atoll in the North Pacific Ocean located about southwest of the island of Hawai'i and is grouped as one of the United States Minor Outlying Islands. The atoll, which is located on a coral reef platform, has four islands. Johnston (or Kalama) Island and Sand Island are both enlarged natural features, while "Akau" (North) and "Hikina" (East) are two artificial islands formed
Alif Dhaal Atoll found in Ariadhoo Island. Whale sharks are year-round residents of Alif Dhaal Atoll. The South Ari Atoll administrative division consists of the southern part of the geographic or natural Ari Atoll (described as Southern Ari Atoll in this context to differentiate from the official name of the administrative division). The atoll consists of Inhabited Islands and Uninhabited Island, a definition which includes resort islands, airport islands and industrial islands. Resort islands are classified as Uninhabited Islands which have been converted to become resorts. The following are the resort islands, with the official name of the resort. Alif Dhaal Atoll Alifu