St. Thomas, St. Croix and St. John are sister islands, but each has its own special character. St. Thomas, the quintessential cruise port, is the bustling busy bee of the trio. In addition to its natural charms, St. Thomas is also a duty-free shopping mecca. St. Croix, 40 miles south, is an island on the move. Its history of agriculture has left sugar mills and plantations to visit, and there is an ever-increasing number of heritage trails to follow.