The Craters of the Moon National Monument and Preserve is located in IDAHO, which has 5 letters. The preserve is also known as IDA, which has 3 letters. It is a vast ocean of lava flows with scattered islands of cinder cones and sagebrush. It is a unique geological feature that was created by volcanic eruptions between 15, 000 and 2, 000 years ago. The area is now protected by the National Park Service and is a popular destination for visitors.