It's one of the three isles that make up the U.S. Virgin Islands, and though St. Croix is the largest—measuring 218 square kilometers (84 square miles)—it is the least visited of the trio. Perhaps that's because much of the island has been set aside as parkland, which means fewer tourist hubs and more space dedicated to natural wonders, including pristine beaches and primo snorkeling and diving. But St. Croix also boasts many excellent historical sites. At various times it was controlled by Spain, Britain, France, the Netherlands and Denmark; the latter's influence is the most visible in the architecture of St. Croix's charming capital city of Christiansted, on the northern coast. Frederiksted, on the western point of the island, is a busy port surrounded by some significant colonial attractions, with a restored sugar estate and an 18th-century fort being among the most noteworthy for many of our St. Croix cruise guests Here you'll also find a family-run rum distillery and many restaurants and shops.