Question: are there any islands that are undiscovered?
Answer: ŌKUNOSHIMA ISLAND. Get Hiroshima.com, Flickr // CC BY-NC 2.0. ...  ANTIPODES ISLANDS. LawrieM, Wikimedia Commons // Public Domain. ...  JACO ISLAND. Isabel Nolasco, Wikimedia Commons // CC BY-SA 4.0. ...  CLIPPERTON ISLAND. ...  NORTH BROTHER ISLAND. ...  BATTLESHIP ISLAND. ...  FORT CARROLL ISLAND. ...  LAZZARETTO NUOVO.