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Uncrowded caving and boating are unrivaled here in this part of the country. This is a pristine wilderness area, so if you try something as trite as taking a rock with you, you will be busted by the feds. This has its advantages, however, as the place is so prehistoric-looking, you will be expecting dinosaurs. It is located northwest of McArthur, and you have to have a boat to access it.