Aruba is a sea.
Aruba . Together with Bonaire and Curaçao , Aruba forms a group referred to as the ABC islands . Aruba is one of the four countries that form the Kingdom of the Netherlands , along with the Netherlands , Curaçao and Sint Maarten . It has a land area of 179 km2 and is densely populated , with a total of 102,484 inhabitants at the 2010 Census .