Recently I took my own advice and visited the island nation of Vanuatu. I had a great time! Since the islands are volcanic and surrounded by coral reefs, the beach sand ranges from pure white to basaltic black, with an intermediate grey-brown in some cases, like the beach in my photo above.
Vanuatu has a range of interesting wildlife (though no native land mammals other than bats). Birds of Vanuatu include the Vanuatu kingfisher (Todiramphus farquhari, above), which I did not see. There are 120 other bird species, including visiting seabirds. Butterflies of Vanuatu (of which I saw many) include the Monarch butterfly (Danaus plexippus) and several subspecies of the Canopus Swallowtail (Papilio fuscus, below).
Underwater, Vanuatu provides wonderful opportunities to see marine life while diving or snorkelling. The Flickr photographs below are by Diane Brook (click images to zoom):