A group of islands in the South Pacific, approximately North East of Australia.
The Yasawa Island chain, to the North West of the main island, is typical tropical island stuff with coconut palms and white sandy beaches. Think Blue Lagoon, which was filmed there. The main island, Viti Levu, is pleasant enough, although Nadi, one of the main towns is a bit of a hole in places.
This wiki page will tell you more about the place.