Sarigan
Size: 4.9 square kilometers (1.9 square miles)
Population:Uninhabited
Highest Point: 549 meters (1,801 feet)
Fast facts: The island is 175 kilometers (109 miles) north of Saipan. Sarigan is a stratovolcano with no known historic eruptions. The island has numerous ravines and valleys with dense tropical vegetation. Perpendicular cliffs surround it, making landing difficult.