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
Addu Atoll Addu Atoll Unlike other atolls of Maldives, Addu city possesses a natural anchorage within the city basin, as the atoll is land-locked with large islands surrounding the atoll. This results in a natural harbor that is very calm and safe for sea vessels at all times, and is not affected by seasonal changes. The atoll possesses four channels which lead into the lagoon. In the north are the Kuda Kandu and Maa Kandu, in the south the Gan Kandu, and the broad Villingili Kandu is to the southeast. There are unique features in the islands of Addu Atoll. The islands