Note: Australia is generally considered to be a continental landmass, rather than an island. If however one does count Australia among the islands it, not Greenland, would be the largest in the world (unless one also considered Antarctica an island).
... many lands and islands
Hernan Fernando Cortes, conquered the Aztec empire in Mexico; sent out expeditions to Baja California
D
Jacques-Yves Cousteau, (died 1997), ...