Although it's not as developed as the other Virgin Islands, there's still plenty to do on St John USVI. Annaberg is the remains of an 18th century Danish sugar plantation. Annaberg is maintained by the Park Service, with a walking tour and signs that describe the different facilities that made up the sugar works. You'll encounter many plantation-era ruins around St John USVI. In the island's interior you can explore mysterious stone carved petroglyphs left behind by unknown native people.You'll also find a full range of water-sports on St John USVI. The snorkeling here is fantastic.