Tortola, or “Land of the Turtle Dove” as it was called by Christopher Columbus, is the largest of the 60 British Virgin Islands. The Island is located 60 miles east of Puerto Rico and 22 miles east of the island of St. Thomas. This mountainous island has an area of twenty-one and a half square miles and is formed of volcanic rock. Minor earthquakes are quite common on Tortola as it lies near an earthquake fault. The principal city is Road Town, the largest settlement in the British Virgin Islands. The currency on the island is the American dollar even though it lies under the British flag.