Disney's Fantasyland dark rides invented a new language of storytelling, where the motions of the ride vehicle became as important to the story as the sights and sounds. Of all the non-Disney dark rides I experienced growing up, only one told a story as creatively as Disneyland's adventures.
My creepiest ride through the mine happened on one visit when -- just as the vehicle entered the building -- a large and very real garden spider dropped onto my upper arm. I had just enough time to see it before being engulfed by the ride's darkness. I spend the next two minutes frantically brushing myself off and flailing my arms around like a lunatic.
The Lost Dutchman Mine, along with the rest of Frontier Village, closed in 1980. It is greatly missed.