Tuanaki or Tuanahe is the name of an anecdotal vanished group of islets, once part of the Cook Islands.
[2] In 1916, the Polynesian Society of Honolulu reprinted an account by a sailor who had visited there in 1842, spending six days among the natives.
However this account added that two years later in 1844, a schooner of English missionaries had found nothing.
The 1916 publication re-ignited interest in the flyaway islands, and explorer Sir Ernest Shackleton, when planning the Shackleton–Rowett Expedition of 1921–1922, proclaimed as one of his goals the rediscovery of Tuanaki.
The explorer died in Antarctic waters before he was able to mount a serious search for the vanished archipelago.