The three major US Virgin Islands require no passport for US citizens, and each has a unique character of its own. St. Croix's Danish influence offers visitors a relaxing vacation experience. Most of St. John is a national park, also boasting some of the best beaches in the Caribbean, including Salt Pond Bay, Trunk Bay, and Cinnamon Bay. In St. Thomas, you can enjoy incredible views of the Caribbean from 1,500 feet above sea level or explore the most visited port in the Caribbean, Charlotte Amalie which offers elegant dining, exciting nightlife, and duty-free shopping.