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
Dongsha Atoll National Park a circular atoll in diameter, with tropical monsoon climate. It is administered under Qijin District, Kaohsiung City. Seagrass Beds are well formed in the atoll and in adjacent waters, providing rich bio-diversities of marine life from fish, jelly fish, squid, sicklefin lemon sharks, and rays to rarer sea turtles, Dugongs, and cetaceans (dolphins and whales). Recovery of green sea turtles has especially been noted. Possible use of the atoll as a breeding ground by lemon sharks have been speculated due to the numbers of infants that have been discovered. Dongsha Atoll National Park The Dongsha Atoll National Park () is