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Onyx Mountain Caverns


category : Natural Attractions
Beautiful Onyx formations, huge dripstone formations, guided tours, woodland Indian cultural information, underground river, gift shop and rock shop. On the National Register of Historic Places.


Admission: Adults, $7.75; Children 5-12, $3.75
Hours: Year round
Address: 14705 PD 8541
Phone: 573-762-3341
Handicapped Accessible.

Come visit us in St. Robert, Missouri

Attractions and Upcoming Events

Things to do Natural Attractions near St. Robert, MO

Miller Trail and Cave

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Boone's Lick State Historic Site

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Jacob's Cave

Largest cave in the lake area. Half-mile of beautiful formations, massive columns, delicate soda straws, stalactite, stalagm...

Onyx Mountain Caverns

Beautiful Onyx formations, huge dripstone formations, guided tours, woodland Indian cultural information, underground river...