French Frigate Shoals Airport is a private airfield on Tern Island in French Frigate Shoals, Hawaii. Located roughly 560 miles northwest of Honolulu, the airport has a coral surface that is 3,000 feet long, 200 feet wide, and sits just six feet above sea level. It is owned by the U.S. Fish and Wildlife Service and is only used for emergencies.
Source imagery: DigitalGlobe