Ndao Island
Ndao is one of the southernmost islands of the Indonesian archipelago. It is part of Lesser Sunda Islands and is located west of the island of Rote Island,  from the coast Australia and  from the Ashmore and Cartier Islands. Administratively, Ndao forms, together with Rote and neighboring islands, the Rote Ndao Regency after the regency was separated from Kupang province. Tourism 
Ndao has some areas that are popular for surfing. References 

Lesser Sunda Islands
Rote Ndao Regency
Landforms of East Nusa Tenggara
Outer Banda Arc