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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

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...

Boone's Lick State Historic Site

Salt was made at Boone's Lick Spring as early as 1805 by Daniel and Nathan Boone, sons of famed frontiersman Daniel Boone. Tr...

Miller Trail and Cave

Short but very steep trail. Wonderful valley view from the huge mouth of the cave. ADA ...

Ozark Caverns

Three types of tours: traditional tour, children's tour and adults tour. All tours are given using hand-held lanterns and con...