text:  See us at 4540 Federal Way on Facebook or at LeisureMattress.com. 100 years and counting. Beginning in May, Craters of the Moon National Monument and Preserve is celebrating its centennial birthday with an array of exciting and fun activities. From star parties to cave adventures, find your own way to celebrate this unique experience. There's nothing like it on Earth. Get event details and learn how to travel with care at visitidaho.org.