Although discovered by two amateur cavers in 1974, the existence of Kartchner Caverns was not commonly known until 1988 when the state purchased the caves and surrounding land for use as a public park. Guided tours last about 1 ½ hours, and lead guests past some of the most amazing and colorful cave formations in the world. The Rotunda/Throne Room tour is offered daily, year round; Big Room tours are offered daily, October 15 - April 15, but due to the difficult terrain of this tour, children under 7 are not permitted. The park also features hiking trails, a Discovery Center and 62 campsites. Reservations: (520) 586-CAVE (2283) or visit their website. Directions: The park is located nine miles south of I-10, off State Hwy 90, exit 302. Park Hours: The park is open 7 days a week. 7:30 a.m. to 6:00 p.m. (MST)