Explore the world underground; professional guides take you along lighted paths beside amazing crystal formations. Don’t miss our gift shop, nature trails, gemstone mining, lookout tower, crawl mazes, picnic areas, and mini-golf.

Guided tours of a seven-level deep natural wonder. The cave is reputed to have been used as a hideout by Jesse James. Facilities include: restaurant; gift shop; motel; campground; canoe and raft rentals; boat rides; sluice; picnic areas and candy store. Closed on Thanksgiving and Christmas. Tours: $18; ages 5-11, $9.

Onondaga Cave, a National Natural Landmark within Onondaga Cave State Park, is recognized as one of the most spectacular caves in the nation because of the quality of its formations. Cave Tours, March-October.

This cave includes a variety of outstanding cave formations, including columns of calcite deposits up to 30 feet tall. The park offers camping, dining, canoeing, lodging, trails and picnicking. Located within Meramec State Park, off Route 185.

Tours: $6; ages 13-19, $5; ages 6-12, $4.

Traditional, children's, and adult tours are offered, all using hand-held lanterns. Bats, salamanders and interesting cave formations are features of this cave. Located in Lake of the Ozarks State Park, eight miles east of Linn Creek, off of Route A. Open April 16-Oct. 14.