Niihau, Hawaii, has been a privately owned island since 1864. It has an area of 72 square miles and is accessible to tourists only via very limited half-day helicopter tours from the island of Kauai.
Niihau Helicopters tours take visitors to the lonely Nanina Beach.
Niihau has only about 130 inhabitants. There is no running water, and electricity is produced by the sun or by a generator.