Inside Alabaster Caverns State Park
Alabaster Caverns State Park, Oklahoma Freedom, Oklahoma

Oklahoma cave destination

Alabaster Caverns State Park

Northwest Oklahoma state-park cave near Freedom with varicolored alabaster and selenite, hourly guided tours, and one of the world's largest natural gypsum caves open to the public.

MetricCave review status

Last reviewed Mar 22, 2026
Reviewed by MetricCave Editorial

Review date reflects the latest MetricCave check of the planning details on this page.

Alabaster Caverns works best when you understand what it is not. This is not a quick metro-area add-on or a generic limestone show cave with a tourist strip wrapped around it. It is a remote northwest Oklahoma state-park cave south of Freedom, and the real draw is the geology: the only gypsum show cave in the United States and one of the world's largest natural gypsum caves open to the public.

The public visit itself is simpler than the setting might suggest. Current TravelOK guidance says guided tours leave promptly on the hour from 9 a.m. to 4 p.m., the route follows a well-lit path, and tours are capped at 30 visitors. That makes the underground portion approachable for most travelers, but the long drive still means Alabaster lands better as a deliberate day trip or an overnight-plains stop than as an impulse detour.

The History & Geology

The cave's identity starts with the Permian sea that once covered this part of Oklahoma more than 200 million years ago. Oklahoma Historical Society material says the sea left heavy gypsum deposits behind, later uplift brought that gypsum close to the surface, and water gradually tunneled caverns through the formation. That is why Alabaster reads differently from most public caves: selenite crystals, white and pink gypsum, and rare black alabaster give it a brighter and less familiar look than the standard gray-limestone show-cave palette.

The main cavern is about three-quarters of a mile long, with named chambers and bridges rather than one single oversized room. Oklahoma Historical Society reference material also places the cave temperature in the 52 to 58 degree range year-round, which is cool enough for a light layer but not the shock you get in some colder cave systems.

The public-travel story developed in stages. Evidence suggests the first known exploration happened in 1898, and local operators offered limited touring in the 1920s and 1930s when the site was still known as the Bat Caves. Englishman Charles Grass bought and renovated the cave in 1939 and pushed the Alabaster Caverns name. Oklahoma purchased the property in 1953, and the area was reclassified as a state park in 1956, which is why the visit today feels more like a state-managed nature stop than a private roadside attraction.

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