The island of St. John, formerly known as St. Jan, belongs to the Virgin Islands group, a natural appendage of the Puerto Rican bank. The islands making up the Virgin Islands group (St. Thomas, St. John, Tortola, Virgin Gorda, Anegada, and St. Croix) and Puerto Rico (Vieques, Culebra, and Puerto Rico) form a geographical, geological, and biological province with many shared natural features.
