Gardner Cave is located in Crawford State Park in Washington. It is the 3rd longest karst cave in Washington State, and the only one accessible to the public. Though small, Gardner Cave has fine speleothems like stalactites, stalagmites, and rimstone pools.

The cave is named after Mr. Ed Gardner, who discovered it in summer 1903. A version of the story claims that he was a bootlegger and discovered the cave in 1899. The park was named after local Metaline merchant William Crawford, who acquired land around the cave in 1921. He deeded a large portion of it, including the Gardner Cave, to Washington State Parks.